too many references in essay

How to Reference in an Essay (9 Strategies of Top Students)

Are you feeling overwhelmed by referencing?

When you’re first asked to do referencing in an essay it can be hard to get your head around it. If it’s been a while since you were first taught how to reference, it can be intimidating to ask again how to do it!

I have so many students who consistently lose marks just because they didn’t get referencing right! They’re either embarrassed to ask for extra help or too lazy to learn how to solve the issues.

So, here’s a post that will help you solve the issues on your own.

Already think you’re good at referencing? No worries. This post goes through some surprising and advanced strategies for anyone to improve no matter what level you are at!

In this post I’m going to show you exactly how to reference in an essay. I’ll explain why we do it and I’ll show you 9 actionable tips on getting referencing right that I’m sure you will not have heard anywhere else!

The post is split into three parts:

• What is a Reference and What is a Citation?
• Why Reference? (4 Things you Should Know)
• How to Reference (9 Strategies of Top Students)

If you think you’ve already got a good understanding of the basics, you can jump to our 9 Advanced Strategies section.

Part 1: What is a Reference and What is a Citation?

What is a citation.

An in-text mention of your source. A citation is a short mention of the source you got the information from, usually in the middle or end of a sentence in the body of your paragraph. It is usually abbreviated so as not to distract the reader too much from your own writing. Here’s two examples of citations. The first is in APA format. The second is in MLA format:

• APA: Archaeological records trace the original human being to equatorial Africa about 250,000–350,000 years ago (Schlebusch & Jakobsson, 2018) .
• MLA: Archaeological records trace the original human being to equatorial Africa about 250,000–350,000 years ago (Schlebusch and Jakobsson 1) .

In APA format, you’ve got the authors and year of publication listed. In MLA format, you’ve got the authors and page number listed. If you keep reading, I’ll give some more tips on formatting further down in this article.

And a Reference is:

What is a Reference?

A reference is the full details of a source that you list at the end of the article. For every citation (see above) there needs to be a corresponding reference at the end of the essay showing more details about that source. The idea is that the reader can see the source in-text (i.e. they can look at the citation) and if they want more information they can jump to the end of the page and find out exactly how to go about finding the source.

Here’s how you would go about referencing the Schlebusch and Jakobsson source in a list at the end of the essay. Again, I will show you how to do it in APA and MLA formats:

• APA: Schlebusch, C. & Jakobsson, M. (2018). Tales of Human Migration, Admixture, and Selection in Africa. Annual Review of Genomics and Human Genetics , 11 (33), 1–24.
• MLA: Schlebusch, Carina and Mattias Jakobsson. “Tales of Human Migration, Admixture, and Selection in Africa.” Annual Review of Genomics and Human Genetics , vol. 11, no. 33, 2018, pp. 1–24.

In strategy 1 below I’ll show you the easiest and fool proof way to write these references perfectly every time.

One last quick note: sometimes we say ‘reference’ when we mean ‘citation’. That’s pretty normal. Just roll with the punches. It’s usually pretty easy to pick up on what our teacher means regardless of whether they use the word ‘reference’ or ‘citation’.

Part 2: Why Reference in an Essay? (4 Things you Should Know)

Referencing in an essay is important. By the time you start doing 200-level courses, you probably won’t pass the course unless you reference appropriately. So, the biggest answer to ‘why reference?’ is simple: Because you Have To!

Okay let’s be serious though … here’s the four top ‘real’ reasons to reference:

1. Referencing shows you Got an Expert’s Opinion

You can’t just write an essay on what you think you know. This is a huge mistake of beginning students. Instead this is what you need to do:

Top Tip: Essays at university are supposed to show off that you’ve learned new information by reading the opinions of experts.

Every time you place a citation in your paragraph, you’re showing that the information you’re presenting in that paragraph was provided to you by an expert. In other words, it means you consulted an expert’s opinion to build your knowledge.

If you have citations throughout the essay with links to a variety of different expert opinions, you’ll show your marker that you did actually genuinely look at what the experts said with an open mind and considered their ideas.

This will help you to grow your grades.

2. Referencing shows you read your Assigned Readings

Your teacher will most likely give you scholarly journal articles or book chapters to read for homework between classes. You might have even talked about those assigned readings in your seminars and tutorials.

Great! The assigned readings are very important to you.

You should definitely cite the assigned readings relevant to your essay topic in your evaluative essay (unless your teacher tells you not to). Why? I’ll explain below.

• Firstly, the assigned readings were selected by your teacher because your teacher (you know, the person who’s going to mark your essay) believes they’re the best quality articles on the topic. Translation: your teacher gave you the best source you’re going to find. Make sure you use it!
• Secondly, by citing the assigned readings you are showing your teacher that you have been paying attention throughout the course. You are showing your teacher that you have done your homework, read those assigned readings and paid attention to them. When my students submit an essay that has references to websites, blogs, wikis and magazines I get very frustrated. Why would you cite low quality non-expert sources like websites when I gave you the expert’s article!? Really, it frustrates me so, so much.

So, cite the assigned readings to show your teacher you read the scholarly articles your teacher gave to you. It’ll help you grow your marks.

3. Referencing deepens your Knowledge

Okay, so you understand that you need to use referencing to show you got experts’ opinions on the topic.

But there’s more to it than that. There’s actually a real benefit for your learning.

If you force yourself to cite two expert sources per paragraph, you’re actually forcing yourself to get two separate pieces of expert knowledge. This will deepen your knowledge!

So, don’t treat referencing like a vanity exercise to help you gain more marks. Actually view it as an opportunity to develop deeper understandings of the topic!

When you read expert sources, aim to pick up on some new gems of knowledge that you can discuss in your essays. Some things you should look out for when finding sources to reference:

• Examples that link ideas to real life. Do the experts provide real-life examples that you can mention in your essay?
• Facts and figures. Usually experts have conducted research on a topic and provide you with facts and figures from their research. Use those facts and figures to deepen your essay!
• Short Quotes. Did your source say something in a really interesting, concise or surprising way? Great! You can quote that source in your essay .
• New Perspectives. Your source might give you another perspective, angle or piece of information that you can add to your paragraph so that it’s a deep, detailed and interesting paragraph.

So, the reason we ask you to reference is at the end of the day because it’s good for you: it helps you learn!

4. Referencing backs up your Claims

You might think you already know a ton of information about the topic and be ready to share your mountains of knowledge with your teacher. Great!

So, should you still reference?

Yes. Definitely.

You need to show that you’re not the only person with your opinion. You need to ‘stand on the shoulders of giants.’ Show what other sources have said about your points to prove that experts agree with you.

You should be saying: this is my opinion and it’s based on facts, expert opinions and deep, close scrutiny of all the arguments that exist out there .

If you make a claim that no one else has made, your teacher is going to be like “Have you even been reading the evidence on this topic?” The answer, if there are no citations is likely: No. You haven’t.

Even if you totally disagree with the experts, you still need to say what their opinions are! You’ll need to say: “This is the experts’ opinions. And this is why I disagree.”

So, yes, you need to reference to back up every claim. Try to reference twice in every paragraph to achieve this.

Part 3: Strategies for How to Reference in an Essay (9 Strategies of Top Students)

Let’s get going with our top strategies for how to reference in an essay! These are strategies that you probably haven’t heard elsewhere. They work for everyone – from beginner to advanced! Let’s get started:

1. Print out your Reference Style Cheat Sheet

Referencing is hard and very specific. You need to know where to place your italics, where the commas go and whether to use an initial for full name for an author.

There are so many details to get right.

And here’s the bad news: The automated referencing apps and websites nearly always get it wrong! They tell you they can generate the citation for you. The fact of the matter is: they can’t!

Here’s the best way to get referencing right: Download a referencing cheat sheet and have it by your side while writing your essay.

Your assignment outline should tell you what type of referencing you should use. Different styles include: APA Style, MLA Style, Chicago Style, Harvard Style, Vancouver Style … and many more!

You need to find out which style you need to use and download your cheat sheet. You can jump onto google to find a cheat sheet by typing in the google bar:

Download a pdf version of the referencing style cheat sheet, print it out, and place it on your pinboard or by your side when writing your essay.

2. Only cite Experts

There are good and bad sources to cite in an essay.

You should only cite sources written, critiqued and edited by experts. This shows that you have got the skill of finding information that is authoritative. You haven’t just used information that any old person popped up on their blog. You haven’t just gotten information from your local newspaper. Instead, you got information from the person who is an absolute expert on the topic.

Here’s an infographic listing sources that you should and shouldn’t cite. Feel free to share this infographic on social media, with your teachers and your friends:

3. Always use Google Scholar

Always. Use. Google. Scholar.

Ten years ago students only had their online university search database to find articles. Those university databases suck. They rarely find the best quality sources and there’s always a big mix of completely irrelevant sources mixed in there.

Google Scholar is better at finding the sources you want. That’s because it looks through the whole article abstract and analyses it to see if it’s relevant to your search keywords. By contrast, most university search databases rely only on the titles of articles.

Use the power of the best quality search engine in the world to find scholarly sources .

Note: Google and Google Scholar are different search engines.

To use Google Scholar, go to: https://scholar.google.com

Then, search on google scholar using keywords. I’m going to search keywords for an essay on the topic: “What are the traits of a good nurse?”

If you really like the idea of that first source, I recommend copying the title and trying your University online search database. Your university may give you free access.

4. Cite at least 50% sources you found on your Own Research

Okay, so I’ve told you that you should cite both assigned readings and readings you find from Google Scholar.

Here’s the ideal mix of assigned sources and sources that you found yourself: 50/50.

Your teacher will want to see that you can use both assigned readings and do your own additional research to write a top essay . This shows you’ve got great research skills but also pay attention to what is provided in class.

I recommend that you start with the assigned readings and try to get as much information out of them, then find your own additional sources beyond that using Google Scholar.

So, if your essay has 10 citations, a good mix is 5 assigned readings and 5 readings you found by yourself.

5. Cite Newer Sources

As a general rule, the newer the source the better .

The best rule of thumb that most teachers follow is that you should aim to mostly cite sources from the past 10 years . I usually accept sources from the past 15 years when marking essays.

However, sometimes you have a really great source that’s 20, 30 or 40 years old. You should only cite these sources if they’re what we call ‘seminal texts’. A seminal text is one that was written by an absolute giant in your field and revolutionized the subject.

Here’s some examples of seminal authors whose old articles you would be able to cite despite the fact that they’re old:

• Education: Vygotsky, Friere, Piaget
• Sociology: Weber, Marx, C. Wright Mills
• Psychology: Freud, Rogers, Jung

Even if I cite seminal authors, I always aim for at least 80% of my sources to have been written in the past 10 years.

6. Reference twice per Paragraph

How much should you reference?

Here’s a good strategy: Provide two citations in every paragraph in the body of the essay.

It’s not compulsory to reference in the introduction and conclusion . However, in all the other paragraphs, aim for two citations.

Let’s go over the key strategies for achieving this:

• These two citations should be to different sources, not the same sources twice;
• Two citations per paragraph shows your points are backed up by not one, but two expert sources;
• Place one citation in the first half of the paragraph and one in the second half. This will indicate to your marker that all the points in the whole paragraph are backed up by your citations.

This is a good rule of thumb for you when you’re not sure when and how often to reference. When you get more confident with your referencing, you can mix this up a little.

7. The sum total of your sources should be minimum 1 per 150 words

You can, of course, cite one source more than once throughout the essay. You might cite the same source in the second, fourth and fifth paragraphs. That’s okay.

But, you don’t want your whole essay to be based on a narrow range of sources. You want your marker to see that you have consulted multiple sources to get a wide range of information on the topic. Your marker wants to know that you’ve seen a range of different opinions when coming to your conclusions.

When you get to the end of your essay, check to see how many sources are listed in the end-text reference list. A good rule of thumb is 1 source listed in the reference list per 150 words. Here’s how that breaks down by essay size:

• 1500 word essay: 10 sources (or more) listed in the reference list
• 2000 word essay: 13 sources (or more) listed in the reference list
• 3000 word essay: 20 sources (or more) listed in the reference list
• 5000 word essay: 33 sources (or more) listed in the reference list

8. Instantly improve your Reference List with these Three Tips

Here’s two things you can do to instantly improve your reference list. It takes less than 20 seconds and gives your reference list a strong professional finish:

a) Ensure the font size and style are the same

You will usually find that your whole reference list ends up being in different font sizes and styles. This is because you tend to copy and paste the titles and names in the citations from other sources. If you submit the reference list with font sizes and styles that are not the same as the rest of the essay, the piece looks really unprofessional.

So, quickly highlight the whole reference list and change its font to the same font size and style as the rest of your essay. The screencast at the end of Step 8 walks you through this if you need a hand!

b) List your sources in alphabetical order.

Nearly every referencing style insists that references be listed in alphabetical order. It’s a simple thing to do before submitting and makes the piece look far more professional.

If you’re using Microsoft Word, simply highlight your whole reference list and click the A>Z button in the toolbar. If you can’t see it, you need to be under the ‘home’ tab (circled below):

You’ve probably never heard of a hanging indent. It’s a style where the second line of the reference list is indented further from the left-hand side of the page than the first line. It’s a strategy that’s usually used in reference lists provided in professional publications.

If you use the hanging indent, your reference list will look far more professional.

Here’s a quick video of me doing it for you:

9. Do one special edit especially for Referencing Style

The top students edit their essays three to five times spaced out over a week or more before submitting. One of those edits should be specifically for ensuring your reference list adheres to the referencing style that your teacher requires.

To do this, I recommend you get that cheat sheet printout that I mentioned in Step 1 and have it by your side while you read through the piece. Pay special attention to the use of commas, capital letters, brackets and page numbers for all citations. Also pay attention to the reference list: correct formatting of the reference list can be the difference between getting the top mark in the class and the fifth mark in the class. At the higher end of the marking range, things get competitive and formatting of the reference list counts.

A Quick Summary of the 9 Top Strategies…

Follow the rules of your referencing style guide (and that cheat sheet I recommended!) and use the top 9 tips above to improve your referencing and get top marks. Not only will your referencing look more professional, you’ll probably increase the quality of the content of your piece as well when you follow these tips!

Here’s a final summary of the 9 top tips:

Strategies for How to Reference in an Essay (9 Strategies of Top Students)

• Print out your Reference Style Cheat Sheet
• Only cite Experts
• Always use Google Scholar
• Cite at least 50% sources you found on your Own Research
• Cite Newer Sources
• Reference twice per Paragraph
• The sum total of your sources should be minimum 1 per 150 words
• Instantly improve your Reference List with these Three Tips
• Do one special edit especially for Referencing Style

Chris Drew (PhD)

Dr. Chris Drew is the founder of the Helpful Professor. He holds a PhD in education and has published over 20 articles in scholarly journals. He is the former editor of the Journal of Learning Development in Higher Education. [Image Descriptor: Photo of Chris]

• Chris Drew (PhD) https://helpfulprofessor.com/author/chris-drew-phd/ What is Educational Psychology?
• Chris Drew (PhD) https://helpfulprofessor.com/author/chris-drew-phd/ What is IQ? (Intelligence Quotient)
• Chris Drew (PhD) https://helpfulprofessor.com/author/chris-drew-phd/ 5 Top Tips for Succeeding at University
• Chris Drew (PhD) https://helpfulprofessor.com/author/chris-drew-phd/ 50 Durable Goods Examples

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The Critical Turkey

Essay Writing Hacks for the Social Sciences

How many sources should I use in my essay?

Possibly the most frequently asked question when it comes to social science essay writing (certainly in first and second year courses) is how many sources should be used in an essay. This is a very legitimate question, especially if you don’t have much essay writing experience to start with. But the answer is not very straightforward. It depends. Rather than providing a fixed number, this blog post lays out what it depends on, and what kinds of parameters play a role in determining the number of readings.

The purpose of referencing

First, however, a short reflection on why you need to use references in the first place. Anchoring this discussion to its purpose will help you gain a deeper understanding of the issue, and the rest will make more sense. It is tempting to see this as a tick-box exercise of a specific number of readings you need to cover. But providing references goes deeper than that.

What distinguishes academic writing from other forms of writing is that indeed, it builds on what others have written before, and makes explicit reference to it. This is because social science is ever-evolving. When we write about social class today, we stand on the shoulders of giants , scholars like Marx, Weber, or more recently, Pierre Bourdieu. And those are only the big names. Hundreds of other authors have dedicated their scholarly lives to academic research, and added bits and pieces to an ever-evolving body of knowledge, be it on social class or any other topic we write about.

Providing references to their work pays tribute to this. It is a sign of respect for the work of others. But it also a way of showing your own awareness of the different debates and different perspectives in the field. And it is a way of showing where your position is. For example, if your analysis of class follows a Marxist tradition, this will show in the readings you use, as you will be drawing primarily on authors that have also followed this tradition (and probably some original Marx as well).

Rather than this being a tick-box exercise, then, referring to the work of others has a deeper meaning. It is about who you are, and where you see yourself, as a budding scholar. And you might not think of yourself as a budding scholar (yet?), but hey, we all have to start somewhere.

Parameter 1: Your ambition

And this brings us to the first parameter, your ambition. If all you want is write a reasonably well-informed essay that achieves a solid pass and a not unreasonable grade (a perfectly legitimate ambition. In our school this corresponds to a grade in the 50s range), fewer sources will do. You still need to demonstrate you have read, and are building on the literature, but there is less emphasis on integrating, for example, different perspectives. If, however, you want to demonstrate that you really know some stuff, and are aware of at least some of the different perspectives (in our school, a 60s essay), you will typically use a few more sources, integrate a few more perspectives, and a little more data and evidence. If you are aiming for those really high grade ranges (in our school, 70 and above), you want to show more of an ‘overview of the topic’, an awareness of a slightly bigger part of the body of knowledge that exists, which will result the use of additional sources, and an extended bibliography.

Okay, I know you want numbers. Here we go then. Let’s say this is a typical 1,500 to 2,000-word essay, first or second year, Social and Political Science at Edinburgh University (if you’re at another school or university this might be different. Even some individual courses might be different. Always check for local conditions): a typical 50s essay here will probably use four or five sources; in the 60s, it tends to be around five to ten, and typical 70s or above essays use probably somewhere between eight and 15 substantive sources. These are rough estimates, though. And importantly, these numbers are not deterministic. You could write a brilliant essay based on just five or six sources and still get that first. Or you could use 15 sources in your essay, but if your argument is off, or your writing is incomprehensible, or the sources aren’t very good, you might still only get a 50s grade.

Parameter 2: The kind of question

The second parameter to consider is the kind of question you are addressing. There are two main distinctions to make here: first, whether the question is mostly on a specific theory or on a topic. More theoretical questions tend to need fewer readings. For example, it could ask about a specific concept by a specific author, say Foucault’s concept of power/knowledge, or Mead’s idea of the Self. Rather than looking at several different viewpoints, this kind of essay question is asking you to engage in detail with only one author’s perspective. This means there is less importance on breadth of reading (expressed in a higher number of readings). However, this does not necessarily make things easier, as there is instead more emphasis on depth of reading. You need to engage thoroughly with that one text, more that you would otherwise. And even though the emphasis is on one author’s theory, depending on your ambition, you still want to consult additional literature, and see how other authors have interpreted and contextualised this particular theory.

If the essay question is on a specific topic, on the other hand, say globalisation, gender inequalities or social class, there is usually more of an emphasis on the breadth of reading, and of you demonstrating awareness of different perspectives and interpretations. This tends to result in a higher number of bibliography entries.

The second aspect of the ‘kind of question’ parameter you need to consider is how many dimensions the question has. In the above example, if the question is about one theorist, you will typically need fewer readings than if the question is asking you to compare theories, for example, compare Foucault’s notion of how power and knowledge are connected to what Marx and Engels wrote about the issue. Both might be 2,000 word essays, but the number of readings is likely to be twice as many if you add this comparison.

The same goes for topic questions. These, too, can involve several dimensions. A question that asks about the impact of globalisation on cultural practices in Japan is more likely to be focused on a selected number of core readings. If a similar question asks about the impact of globalisation on culture, the economy and politics in Japan, this multitude of dimensions will require additional readings for the additional dimensions.

Parameter 3: Quality of sources

Another parameter that determines the number of sources you need to use is the quality of your sources, and the kinds of sources you use. Once again, two distinctions are important here. First, there is a difference between core readings, and ones that are more peripheral. The core readings should indeed provide the core of your argument, and the basis for the essay to build on. They are usually provided in the course material, either as essay readings, or for the respective lectures or course units the essay builds on. The decisive point, however, and what defines these as core readings for the purpose of your essay, is that they touch on the core of what the essay is about. Peripheral readings are ones that provide examples, additional material, data and illustration. They help your essay branch out, and cover just that little bit more ground. The point, however, is that they are additional, and if push comes to shove, you could probably do without them. The core readings, in contrast, are indispensable.

This distinction is important for how you count your number of readings. Core readings count fully; peripheral readings, not quite so much. This can become a problem if your bibliography is overly weighted towards peripheral readings. If you have, say, ten readings in your bibliography, but only one or two are on the core of the topic, this will be insufficient, despite the relatively high number of readings. If we take the above example of the effects of globalisation on Japanese culture, if only one or two readings are on globalisation, and ten others on examples, this might leave the core a little hollow, and the discussion of globalisation in a more general sense might just not have sufficient substance. I have used the word ‘might’ here, because this does depend on the kinds of readings, and there is a chance that this bibliography actually does work. The important point is that this is something you need to pay attention to, and ultimately it is your judgment call.

The second distinction of the kinds of sources is between academic and non-academic sources. As a rule of thumb, you should be very careful about using non-academic sources in the first place. All of the above is written on the assumption that we are talking about academic (i.e. peer-reviewed) journal articles and books. Under certain circumstances, however, it is possible to use non-academic sources, such as news articles or blogposts, mostly to provide current examples and illustration of whatever you are writing about. If you do use such sources, however, they should never be seen as a replacement for academic sources. And when you count how many sources you have used, you should simply take these out of the equation. If you have used, say three academic sources and 15 non-academic sources, in the eyes of your marker (at least if I am that marker) you have only used three sources, plus some additional, peripheral, illustrative material. This is not to say that this additional material cannot also be very useful. But as discussed above, academic essay writing starts with an acknowledgment of what is already out there in terms of academic literature and research, and is based on the body of knowledge that has evolved over time on a specific topic, not on yesterday’s news.

Parameter 4: specific instructions

The last parameter to consider can throw the entire calculation over board. It is whether the essay question comes with specific instructions. Such instructions could be, for example, that an essay in social theory really only needs to engage with this one theory. This gives you permission to limit the number of readings. However, be careful here, as this can be a false friend. Reading additional secondary literature on the theory might actually help you understand it better.

Or you might be encouraged to use news articles to provide examples for your discussion. This can potentially lead to a much higher number of bibliography entries. But as discussed above, this should not replace academic literature, and the latter should always form the basis and core of your discussion.

These four parameters are what I think are the most relevant determinants for the number of readings you need to use in your essay. But maybe I missed something? What other considerations do you think are important? Or maybe you disagree with some claim made in this article? Do let me know in the comments below.

3 thoughts on “How many sources should I use in my essay?”

These articles are so, so helpful. Thank you so much.

Thank you so much! This helps me a lot : )

This is so helpful and clear, thanks a lots

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How Many References in a Research Paper?

Junior researchers frequently wonder how many references should be included in their research papers. The common response? “As many as you need.” What exactly does that mean? While we admit there are very few hard-set rules regarding this issue, in this article, we will try to provide more concrete guidelines that will help you assess whether you have enough references in your paper.

Before we do so, let us briefly explain why references matter and whether the number of references you include can project certain perceptions about the quality of your work. There is such a thing as having too many or too few.

Why are research paper references and citations necessary?

References show that you have carefully reviewed the relevant literature and are now contributing something  novel  to the academic community. You establish authority and credibility when you can critically assess other literature and distinguish your findings from previous works (if any exist). We emphasize “critically assess” in the last sentence because references are only as good as you apply them to your research. Therefore, the famous adage “quality over quantity” is the key to deciding how many references are sufficient.

Likewise, citing your references within the research paper itself (in the form of academic citations ) is crucial in any academic work that makes assertations based on external studies. Failing to cite your sources can result in plagiarism, which even if accidental can still have some devastating consequences for academic researchers hoping to publish their work or finish graduate school.

Number of Sources Used Can Impact Perceptions of Quality

We would be remiss if we didn’t tell you that being at either extreme (having too few or too many references) can reflect poorly on your intellectual aptitude and your study’s validity. Here’s why:

• If you don’t have enough references, particularly on a topic familiar to a wide audience, readers may think that you haven’t done enough research into existing literature. Surely someone else has thought about related topics or used similar techniques. If you’re sloppy in conducting your diligence, readers will wonder whether your paper is worth reading. What’s novel and valuable about your paper? Were you just as sloppy with conducting your study? The answers to these questions need to be evident.
• Additionally, readers might be concerned that you may have plagiarized by failing to properly cite information. Unless you’re John Nash, who cited only two texts in his seminal  26-page PhD thesis  (one of which was to his prior work), ensure that you’ve properly researched the relevant papers and included appropriate citations! Especially, make sure that you have found, read, and included all the latest publications on your topic before finalizing and submitting your own paper—if the drafting process took some time, new literature might have come out in the meantime, and you don’t want to give the editor the impression that you are not on top of the newest developments.
• If you have too many references, readers may wonder if you did any original research at all. Unless you’re writing a literature review, your paper’s primary focus should be on your investigation and findings. Don’t bury your hard work under strings of citations and discussion regarding other works. Show your readers what you’ve discovered and how the new information you present fits into or departs from the academic community’s current understanding of your topic.

Additionally, let us highlight the difference between the number of references versus citations. References are the source materials; therefore, each reference should be listed only once in your references section. Citations are meant to identify the source of the information you use in your paper. You can cite a reference multiple times. Therefore, the number of citations you have is typically larger than the number of references an average paper includes. The opposite situation should never happen!

Key Factors Influencing the Number of References You Use

The following are some of the many factors that may influence the number of references you use:

• The number of references required for a paper will depend largely on your work’s purpose . For example, literature and systematic reviews are surveys of existing studies. Therefore, their reference lists will be more exhaustive than those of research papers whose primary focus is the current authors’ findings. Indeed, if you examine many journals’ author guidelines , you’ll note that journals have a higher maximum reference limit for review articles than original research papers.
• The length of your reference list will also depend on your research paper’s subject matter . For example, if you are writing about a field that is less studied (such as a subfield of neuroparasitology) you may discover that there aren’t many papers to cite. Similarly, newer fields will have fewer published papers that can be referenced. If you find yourself in this situation, review the references used by relevant current literature and see if you can expand your research, and thus your reference list, with valuable content from there.
• Another factor will be your  institution or journal’s requirements . If you are preparing a dissertation or thesis, double-check your department’s requirements. While rare, they may have specific limits. More commonly, journals restrict the number of references due to printing constraints.
• It may happen that you don’t have  access to certain literature  that could have served as a reference. In such a situation, you may wish to look for an institution that may be able to provide you access to that literature for the purposes of reviewing the content or contact one of the authors directly and ask for a copy.
• Given that more papers are being published than ever before in most fields, it is likely that reference lists will grow longer simply because there are more data and discussions of existing data available to cite . Keep track of changes to the size of reference lists in publications related to your field.
• Finally, a paper’s length bears some correlation to the number of references.

So how many references should be included?

Below, we provide tips on how to decide if you have enough resources. We also provide some general reminders on how to effectively use references. After all, references are meant to enhance your paper while still maintaining your research as the focal point.

Use academic journals as a guide

• One way to gauge how many references you should have is to survey academic journals for your article type in your field. Review their author guidelines for limits on the number of references for your article type, and make sure your reference list complies with those journal restrictions.
• Read recent articles relevant to your topic; check how many references other authors have included in their papers for the same article type as yours, and how frequently those works were cited per page.
• Keep in mind that the above methods will give you an estimate of how many references you should include overall but will not tell you how many citations you’ll need per page. The latter is impossible to state simply because certain sections may have no citations at all (the results section , for example).

Statistics regarding the number of references and citations

To give you a general idea, the following are some estimates from a couple of studies that examined the citation characteristics of articles published in various disciplines.

According to  Milojević’s study  encompassing research in the fields of astronomy, mathematics, robotics, ecology, and economics, the highest and average number of references per article page were as follows:

• Ecology: highest, ~58; average reference per page, 6;
• Math and robotics: highest, ~28; average reference per page, <1; and
• Economics: highest, ~ 32; average reference per page, >1 but <2.

The above findings were based on data compiled from the first 20 years of the author’s research. Since then some fields have increased the number of references. Thus, make sure to examine your target journal’s most recent and relevant publications for a better idea of how many references to include based on the specific type of article you plan to write.

In another study by Falagas et al. (2013),  medical journals averaged  29 references for articles that were 7.88 pages long (as printed in journals).

Finally, although the sample size was small (63 journals), Gali Halevi observed the following citation trends of a broader range of disciplines.

• The average number of references per article was the highest for the social sciences, physics, and astronomy, and arts & humanities (roughly 54 references per article).
• On the other hand, health professions and earth and planetary sciences had the fewest references per article at an average of 8 and 17 references, respectively.
• Math and engineering averaged at roughly 29 references per article.
• Biochemistry, genetics and molecular and other biological sciences averaged at 51.
• Hard and natural sciences more frequently cited recent literature while social sciences and math were likely to include older sources.

Note that the Halevi study is limited in size, fails to factor in article type and does little to account for variances across different fields and journals. For example, it is possible that more review articles could have been reviewed for certain fields than others. With that said, we provide the above information to provide a rough estimate.

At the end of the day, please keep in mind the requirements of your institution or target journal and the general trends for your specific article type (by examining the most recent relevant publications).

For additional information regarding journal restrictions on the number of references, read this article on ways to grow your publication list .

Some Dos and Don’ts for Reference Citation

• Don’t repeat references within a reference list.
• Don’t repeatedly cite yourself. Make sure to balance your discussion with external literature citations.
• Be careful about citing old references. The rule of thumb is to go back at most five to six years. Exceptions to this rule should be reserved for “seminal” works relevant to explaining what prompted your research. Roughly 85% of all cited works should be less than five years old.
• Be careful not to cite several references in one place  without  discussing the relevance of each work to your research. In other words, don’t say, “We referred to previous studies in this field (1-7)” unless you later explain how each of reference #s 1-7 apply to your discussion.
• Confirm the quality of the work you cite. Are there any ethical issues regarding the paper that would disqualify it as a good source? Do your references come from reputable sources such as respected journals rather than random blogs and website links? Remember that your analysis is only as good as the verifiable information you use to conduct your research.
• One of the main purposes of citing existing literature is to show the “knowledge gap” regarding your topic. Therefore, make sure the works you reference naturally lead readers to wonder about the research question you address in your paper. To explain further, think about your favorite fictional story. A successfully written story only reveals the background information needed for the reader to follow along in the story. You’ll rarely see an author waste time writing about how the main character stubbed his toe one day while going to work unless that event relates to an important aspect of the story. Similarly, the references you cite should support the story building you create in your research paper.
• Don’t completely ignore the paper that could disprove your hypothesis. You want to show objectivity and that you took a balanced and unbiased approach to conducting your research. Mention the potentially conflicting evidence and explain why you believe it is flawed or inapplicable to your research.
• In qualitative research papers, you may have fewer references.
• Anything you cite in your paper should be listed in the references section (or reference list). Anything listed as a reference should have been quoted or paraphrased in the text. If either rule is violated, something is wrong.
• Finally, remember that a paper will typically have more citations in the Introduction section and Discussion section than in other parts.

Wordvice Academic Resources

If you need help with paraphrasing text from the sources you cite to avoid plagiarism, with different citation styles , or with finding the perfect journal to submit your paper to, then have a look at our collection of articles on the Wordvice academic resources website . We also recommend our professional English editing and proofreading services , including paper editing and academic editing services to ensure that your writing is free of errors before submitting your manuscript to a journal.

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Incorporating References

Make the best use of your research efforts by incorporating reference information clearly into your text and citing that information consistently. Rather than writing a paper around selected quotations and paraphrases, you should be working to integrate research into your own prose in a clear and legible way. Remember, the purpose of evidence is to support your own points. Use information from credible references through quoting, paraphrasing, and summarizing with citations to strengthen your argument.

Putting the Information in Your Own Words

When including evidence from a source in your paper, you have multiple options for how to incorporate that information. Unless the reference is best stated and most effective for your purposes as a quotation, paraphrasing or summarizing is a good way to use research to make your argument. Both require restatement of the material in your own words, while conveying the same ideas or conclusions as the original that you are citing. Remember, you need to cite the source for all material that you have paraphrased or summarized. Even if the words are your own, you must give the author credit for the specific idea. See  Paraphrase and Summary  for more information.

Example  

In Macbeth , the Weird Sisters return constantly throughout the play as the underlying prophecy unfolds (Shakespeare). 

Here, the writer is referencing a recurring action in a play, which cannot be easily displayed in quotes. Therefore, summarizing is necessary in order to integrate this information into her work. Although the description of the play’s contents is her own, she must attribute this sentence to William Shakespeare because it is not her original ideas being referenced. 

Using Direct Quotations

Alternatively, you may use the exact words from the source as a direct quotation. Quotation marks are used to indicate material that is borrowed verbatim and should be followed by a citation. The punctuation and formatting around quotes can be tricky. See How to Use Quotation Marks (Purdue OWL) for examples. Sources should be cited for all borrowed material, whether direct quotations or ideas. Citation conventions vary by discipline; see our guides on  APA Formatting ,  Chicago Formatting , and  MLA Formatting  for your specific citation formatting style.

Integrating Quotes in Paragraphs 

Every time you use a direct quote, you should be sure to explain why the quote is significant to the topic of the writing. Avoid stacking quotations on top of each other and make sure you give each quotation an appropriate amount of analysis and discussion. A common tactic to use for integrating quotes is the “quote sandwich” method. First, introduce the quotation with context and a signifier (Ex: “As the author states”). Then, comment on content, explain its significance, disagree with it if necessary, but do not drop a lengthy quotation in the middle of the prose with no comment. The introduction and explanation form the two “bread slices” of the quote sandwich, seamlessly working the source’s content into your original work. Note that while this is necessary for quotes, it is also recommended for paraphrased and summarized information. 

Example 

Students should not worry about the first draft of an essay being perfect. In her book, Bird by Bird, Anne Lamott writes, “Almost all writing begins with terrible first efforts. . . . A friend of mine says that the first draft is the down draft – you just get it down. The second draft is the up draft – you fix it up” (25). Therefore, just get words down on paper during the first draft. You can revise and edit it later. 

Quoting vs. Paraphrasing

When trying to decide how to integrate a short selection from a source in your essay, it can be difficult to know whether it’s best to use a quote or paraphrase. This may depend on the discipline or style you are using. For example, APA writing often uses paraphrasing while MLA incorporates more quotes, though still in limited amounts. Use the following chart to help determine which strategy is best:

Citing Reference Sources

To avoid plagiarism, cite everything you borrow in the text unless that information is common knowledge. For many reference styles, citations are required both in the text of the essay right after you use information from a source and on a bibliographic page at the end of the essay.  

First, if you had to look up the information in any way, it needs to be cited. In addition, consider if this information is something most people would know off the top of their heads. If not, it also needs to be cited. If you are not sure whether a source needs to be cited as you are writing, a question you can ask yourself is: “If I were having a conversation with my friends about these ideas, would I be comfortable claiming them as my own?” If the ideas feel too similar, that is a sign that you should cite the source, even if you are not completely sure that you need to. Although you want most of your statement or argument to be your own, it is always better to cite too much evidence than too little. 

What is required within the in-text citation varies by style. For example, MLA usually has the author’s last name and the page number while APA includes the year as well. The formatting (where and how the citations are included in the sentence) changes by style as well. See our guides on  APA Formatting ,  Chicago Formatting , and  MLA Formatting  for your specific citation formatting style. 

MLA In-text Example  

“A friend of mine says that the first draft is the down draft – you just get it down. The second draft is the up draft – you fix it up” (Lamott 25). 

APA In-text Example  

“A friend of mine says that the first draft is the down draft – you just get it down. The second draft is the up draft – you fix it up” (Lamott, 1994, p. 25). 

Sometimes bibliographic citations can stand on their own. In media such as book reviews or short academic reflections, most of the ideas will be attributed to the source’s author and are written in generalities. In these cases, the source is only cited in the bibliography in order to establish that none of the ideas in the work are the writer’s own.

Determining What Constitutes Common Knowledge

Sometimes, however, common knowledge is difficult to determine. Consider information common knowledge if:

• reliable authors refer to it without citing its source,
• most people knowledgeable in the field accept it as a fact,
• few experts would dispute it,
• it is reported in most introductory textbooks or basic reference books on the subject.

For example, it is common knowledge that Isaac Newton’s first law of motion is inertia. When discussing this principle, it is not required to cite the Philosophiae Naturalis Principia Mathematica every time you mention Newton’s ideas. However, if you are referencing another author’s paper where they analyze Newton’s law of inertia, you must cite this author’s work as a source even if her paper’s core content surrounds common knowledge. 

In addition, keep in mind that the ultimate test is whether your audience can access your research by using the material you have provided. If in doubt, cite your source. 

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How many references should I have?

Use as many references as you need You’ll need an appropriate amount for your academic level – this will vary

Reference everything you cite  If you use an idea, cite and reference it

Ask your tutor They may have guidance for you on how much reading they expect you to do

Students sometimes worry that there is an optimum number of references that they need to cite.

There’s no right or wrong answer  answer as to how many references you need – it depends on how many you’ve cited in your writing!

The most important thing is that you don’t plagiarise. Make sure you include references for everything that you’ve cited in the text, so that it’s clear where your information has come from.

Depending on what you’re writing, you might have only a few. As long as they are appropriate for your level of study, and you have enough evidence to back your arguments, you shouldn’t worry.  Lab reports, for example, might have relatively few references because you are writing up work that you have done in the labs.  

You can also look at the marking criteria for your assignment as that might indicate on what is or isn’t sufficient. If in doubt, check with whoever set you the work as they might be able to give you a clearer idea.

Remember, you are looking to provide proof that you have done the research. Citations and referencing point your readers to the sources you have used in your research process.  

Writing Better University Essays/Referencing

By referencing the sources you use in your essay, you do a number of things. First of all, you comply with an academic convention. Secondly, you make your essay look more professional. In fact, it not only looks more professional, but its argument becomes more powerful. Thirdly, you allow others to check your sources. This is often only a hypothetical issue, but a look through the list of your references will allow others to judge your argument quickly. Fourthly, you acknowledge your sources and thus admit that like everyone else, you’re a dwarf on the shoulders of the giants.

The essential bits of referencing require you to provide enough information to others so that they can identify the source. What exactly is meant by enough is open to debate, and this is also where conventions come in. Essential is that you do provide references. Ideally, you would do so properly. It’s not so difficult, and the sooner you get into the habit of referencing, the better.

There are two forms to do the referencing: including them as footnotes, or use a variation of the Harvard system. Your institution may have a preference, or even a house style. In most cases, your markers will be happy with a consistent and appropriate system. The Harvard system is also known as author/date, and will be described here in more detail.

• 1 Inside the Text
• 2 At the End
• 3 Problem Cases
• 4 Plagiarism
• 5 Citations and Quotations
• 6 When to Put the References

Inside the Text [ edit | edit source ]

Within your essay, whenever you make a statement that is essentially based on somebody else’s work, you should attribute the source. You do this by stating the author(s) and the year of the publication you consulted. Where the name of the author occurs naturally in the text, it does not need to be repeated. The references are usually included at the end of a sentence, or where inappropriate in a place where the text flow is not interrupted too much, such as in front of a comma. This may be necessary, for example, if only the first half of your sentence is based on someone else’s work.

The name of the author is included in brackets, together with the year of publication. Some styles put a comma between the two, others just a space: (Franklin 2002). Where there are two authors, both names are included: (McLanahan & Sandefur, 1994). Some styles prefer the word and , others prefer the ampersand (& symbol). Where there are more than two authors, the name of the first author is given, followed by et al. (which literally means and others ): (Almeder et al. , 2001). Some styles put et al. into italics, others don’t.

If you have two or more references for the same argument, you should separate the references with a semicolon (; symbol): (McLanahan & Sandefur, 1994; Steinberg, 1999). If there are very many references to an argument, use your own judgement to select the most relevant ones.

What should you reference? Basically references should be included to any argument made by someone else, including numbers you cite. However, statements of general nature need not be attributed to anyone. A statement that the sky is blue alone does not require a reference. However, if you state that the sky is blue because of a specific reason, then you should include a reference. If you use the exact words of an author (quotation), you’ll need to give the number of the page where you copy from. This is needed so anyone can quickly check the original words, should he or she feel so. See the separate section on quotes.

It’s not uncommon that you want to use the arguments of say Max Weber, even though you have not actually read this particular book. Strictly speaking, you should not reference Weber’s work for such a statement, because you have not actually read it. Can you really be sure this is what Weber said or meant? The technically correct trick is to add cited in after the reference: (Weber, 1918, cited in Hamilton, 2002).

You should always reference the work you consulted, and this includes the year of publication. Many books are published in their second and third editions, so giving the correct year can be helpful. Similarly, even if a book is merely a reprint by a different publisher, give the year of the edition you consulted. The page numbers may differ. If it’s just a second print of the exact same book, use the original date. Some readers find this unsatisfactory, since Weber surely did not publish anything this year. The convention to circumvent this issue is to give both years: the year of the original publication, together with the one of the work you consulted. Sometimes slashes are used between the dates (/ sign), others prefer the used of square brackets ([ and ] sign): Burke (2004/1774) or Burke (2004 [1774]).

Another small issue occurs where an author published more than one book or article in a single year, and you want to cite more than one of them. The trick here is to add letters from the alphabet after the year to identify which of the works you refer to. Use the letter a for the first of your references, the letter b for the second and so on: (McManus, 1994a) and (McManus, 1994b) are two different works.

To sum it up, inside the text, you give the family name of the author, followed by the year of the publication. Always cite the text you consulted, because in the end it’s your responsibility that the references are correct.

At the End [ edit | edit source ]

At the end of your essay you should include a list of references. Such a list of references provides more details than just the name of the author and the year of publication. It’s this list that allows identifying the work cited. Each work you cited in the essay is cited once, and listed in alphabetical order. Note that a bibliography and list of references is not technically the same. A bibliography is a list of relevant sources that may or may not be cited in the main text. References are the sources you cited, even if they are rather trivial. Use the heading references for your references.

For books, you put the family name of the author(s) and their initials, followed by the year of publication in brackets, the title in italics, the place of publication, and finally the name of the publisher. If there are editors, give their names instead of the authors’. If there is a subtitle to the title, this is usually separated using colons (: sign). Where there are more than four authors, it’s common to use et al. after the first three, but some styles insist on citing all authors. Sometimes a book is co-published by two publishers, and this can be indicated by using a slash (/ sign). Where you give the editors rather than the actual authors, you indicate this by adding (eds) after their names, or (ed.) if there is only one. The title is capitalized. For example:

Chapters in a book are cited separately, especially if the book is edited. You give the family name of the author and his or her initial, the year, the name of the chapter in single speech marks (‘ and ’ sign; not capitalized), followed by the word in , and the name and year of the editor(s). If you cite only one chapter, you can give the whole reference at the end; otherwise it’s enough to give the name and year of the editor. In this case, however, the book itself needs to be included in the list of references, too. For example:

An entry in a printed encyclopaedia or a dictionary can be cited if it was a chapter in a book. The editors are often given on the front of the reference book. For example:

Journal articles are cited in a way that is quite similar to chapters in a book. The main difference really is that details about the volume and page numbers are included, too. The reference starts with the name and initial of the author, the year in brackets, the title of the article in single speech marks (not capitalized), followed by the name of the journal in italics (capitalized), and further details. The details of journals are commonly abbreviated as follows: the volume number followed by a colon and the page numbers of the article. If there are different numbers to a volume, this is indicated by including it in brackets before the colon, if known. Online journals may not have page numbers. For example:

Pages on the internet should be cited where used. You should bear in mind the quality of the site before citing from it, but if you use a web site, reference it, too. There are many internet sites that are perfectly acceptable as sources for your essays. The reference includes the name of the author and initial, the year in brackets, the title of the document in italics, the word online in square brackets, the place of publication, the publisher, the words available from : followed by the URL, and the date when the document was accessed in brackets. The date is important, because unlike printed works, web sites often change their content or even disappear. Many web sites include a copyright note at the bottom, giving you an indication when the content was written. For example:

Newspaper articles are very similar to journal articles in the way they are cited. The key difference is that rather than the volume, the date is given. The reference therefore includes the name and initial of the author, the year of publication in brackets, the title in single speech marks, the name of the newspaper in italics (capitalized), the date, and finally the page where the article was found. For one page it’s customary to use the abbreviation p. , for articles running over two or more pages, the abbreviation pp. is common. For example:

Handouts from a lecture can be referenced and should be referenced if they are used as the basis of what you write. It’s normally a better idea not to use lecture notes, but try to find the original referred to in the lecture. Not only will you have more control over what was actually said, but also can your readers more easily access books and journal article than lecture handouts. The reference to a lecture handout includes the name and initial of the lecturer, the year in bracket, the title of the handout in single speech marks, the words lecture notes distributed in followed by the name of the course in italics, the word at and the name of your institution, the place, and date of the lecture. For example:

Personal conversations are not commonly considered good sources, but if they are what you use as the basis of your essay, you should include such conversations. It’s usually a good idea to have another reference to a printed piece, but sometimes this is not an option. In terms of giving the reference, personal conversations are very easy: the name of the person you spoke to, the year in brackets, the words conversation with the author and the date of the conversation. For example:

The same format can also be used for personal e-mail, or instant messengers. Once again, bear in mind the credibility of your sources. With e-mail messages it’s customary to include the e-mail address of the sender in brackets after the name, but it’s essential that you obtain consent from the author. The subject line of the e-mail is often included as the title. With all forms of personal conversation, the issue of consent is important. It’s always a very good idea to check with the author first.

Problem Cases [ edit | edit source ]

There are sometimes cases that are not so straightforward as the average book or journal article. For everything there is a solution in the academic conventions. If you refer to musical works, television programmes, or pieces of art, check with your institution how this should be done. If everything else fails, remember the function of referencing, and provide a reasonable amount of information for others to chase the work. Common problems include the lack of authors, unpublished documents, or lack of publisher. Where there is no author, often there is an organization. Put the name of the organization. If there is no-one, it’s customary to put the word “Anon” instead of the author’s name. For example:

Sometimes the year of a document is not known. Where you have a rough idea, you can put a c before the date, such as in (c.1999). Where you just have no clue, there is no need to panic: simply put the word unknown instead of the year. Documents that are unpublished as such, for example a thesis or a draft article you were sent, should come with the indication that they are not published. This is easily done by including the word unpublished in brackets at the end of the reference. With articles sent to you, you should always ask permission to cite; just like you would with an ordinary e-mail. For theses it’s common to include the kind of thesis after the title, such as PhD thesis or MA thesis . Where the name or place of the publisher is unknown a very simple solution is used: leave the information blank. This is particularly an issue with internet sites. Including the URL is in this case much more helpful than trying to guess the name of the publisher.

Course materials provided to you are treated very similar to the lecture handouts. Give the name of the author, the year in brackets, the course code if there is one, the course title in italics (capitalized), the kind of material and its title in single speech marks, place of publication, and publisher. For example:

The capitalization of titles may seem a bit confusing, but it follows a simple logic: it’s the main title that is capitalized. In the case of a book, the main title is that of the book. In the case of journal articles, on the other hand, the main title is thought to be that of the journal itself. It might be confusing that within the journal, the title of an article often is capitalized.

Capitalization is not very hard to achieve. Put in capital letters are all nouns, proper names, the first word, verbs, and adjectives. This is in fact almost everything. Not put in capital letters are words like and , in , or , or with . Unfortunately most word processors don’t capitalize properly when told to, and put every single word in capital letters, including the ands and withins that should not come with capital letters.

Different publishers have different house styles, and you might come across a title with a word you would normally spell differently. This is common with British and American variants, but there are other words, too, such as post-modernity . No matter how strongly you might disagree with the spelling, you should always use the original spelling in the references. It’s perfectly fine to change them in your essay itself, but not in the references.

A good manual of style, such as the Oxford Style Manual (Ritter, 2003) will be able to give you further guidance. Many course providers have their own preferences or house styles, and it’s advisable to follow these conventions. Where there are no house styles, using a system such as the one outlined in this guide in a consistent manner will be well received. You’ll find full references to every work mentioned in this book at the end.

Plagiarism [ edit | edit source ]

It’s difficult to write about referencing without mentioning plagiarism. Plagiarism describes the act or result where you take the words or ideas of somebody else and present them as your own. Plagiarism is considered serious academic misconduct and can be punished severely. Most importantly, however, your reputation is on the line.

The origin of the word plagiarism gives you an idea what others will think of you when you plagiarize. The word goes back to the Latin plagiārius , a thief and kidnapper—in particular a child snatcher and somebody abducting slaves. The modern use in academia brands you a literary thief (OED, 2005).

There are a number of reasons why plagiarism occurs. The worst case is deliberate plagiarism (for whatever reason). Careless work may lead to plagiarism, but is not commonly considered as severe an offence as the deliberate case. Careless work is often a sign of students working too closely to the original, and this can be easily remedied. Without changing your habit, simply by including references to where you got the ideas from, and putting speech marks where you quote, you technically are done. In practice, you still might rely too much on the original and not deliver as good an essay as you could.

Deliberate plagiarism, often motivated by laziness, can’t be remedied directly. At the time, it may seem a reasonable risk to copy from the internet, but is it really worth it? Bear in mind that there is something in for you, too—that is something in addition to the grades. The more you write, the easier it gets.

If you work too closely to the original, there is a simple solution: don’t write the essay with the books in front of you. By so doing, there is very little danger that you copy word by word. In a way, you force yourself to make the material your own: and that is a good thing—it makes a better argument, your essay will be more original, and not least, you’ll also get better grades. Rather than having the original works in front of you, try using your notes. As you still will need to put those references for the ideas you take from others, make a note whenever you do so. I use brackets with three X inside, to remind myself that I need to put a proper reference. Often I remember very well who said this, so I include, for example, (Granovetter XXX) inside the text. When checking the essay, it’s hard not to notice the triple X; and there is always the search facility in the word processor. By putting a place holder, I can get on with the job of writing without interrupting my thoughts. Equally important, I leave some traces indicating to myself that there is some more work to be done: finding the proper reference, for example.

If you think plagiarism is hard to detect by your marker, think again. There are a great number of signs that give plagiarized work away. Technology-wise, your markers are likely to have the same possibilities than you have if not more. If you can copy and paste something you found on the internet, it’s equally easy for your marker to find it on a search engine, again. It would, of course, be possible, to change plagiarized work to the extent that the deed is no longer easy to spot. Usually, however, this is just as much work as writing the essay yourself.

Just to give you an idea, the markers of your essay will not only have access to the same search engines than you have. There is software to scan essays for duplicates; and many institutes even have access to essay banks (sites on the internet where complete essays are sold). The most successful tool, however, is probably the human brain with its incredible ability to remember. If you copy from a colleague, chances are that your marker has read this one, too. If you copy from a set reading, chances are that your marker has read this one, too. Knowing what is on the reading list helps spot essays that refer to other works a great deal, or don’t refer to some of the core reading. Your marker can estimate how many readings you had time to read, or whether you’re likely to have read a great number of papers on the Belgian perspective of whatever issues is set in the question. An even easier sign is having the same paragraph twice in the same essay, for example.

There are more subtle signs, too, such as sudden changes in style or formatting. Many people are unaware of how idiosyncratic one’s writing style is. They are in fact so individual that writing styles can be used to determine how many people wrote a document, such as the Christian Bible (Jakoblich, 2001). Writing style includes the tenses we use, the level of formality, our own choice of words, the kinds of metaphors we put, whether we use American or British English, choices over punctuation, the length of sentences, or the use of specialist terms. Typographic signs include font size, choices of where to break paragraphs, spaces in between lines, and things like proper m- and n-dashes (when copying from electronic articles).

The presence or lack of references is often an easy sign: for example, where there are many references inside the text, but few at the end, or where the citation style changes within a single essay. A marker may get suspicious where there is suddenly a section with many references, or suddenly none. Sometimes, students even include hyperlinks in references when copying from electronic journals; and have them automatically underlined by the word processor.

Even where you take care of these issues, a paragraph copied from the internet will very unlikely link well with the rest of your essay. The style may be inappropriate, or just different. Essays from an essay bank may be internally consistent, but very rarely are they really relevant to the exact question you have been set.

In summary, you can avoid plagiarism easily. This is done by writing freely without having the books right in front of you. Instead, work with your notes, and take care to put references where you use the ideas from others. Don’t use the internet to copy from, no matter how tempting it is. It will hardly ever be worth it.

Citations and Quotations [ edit | edit source ]

There is an important difference between citations and quotations. Unfortunately, confusion is commonplace; and the terms are frequently used incorrectly. Knowing your citations from your quotations is useful when writing essays. It’s essential, in fact, if you want to reference properly.

Citations are about ideas you take from others. Quotations are about the exact words used by others. This is really the whole distinction. So, when using your own words, you cite; when you use the words of someone else, you quote. “Why can’t a man be more like a woman?” (Blankenhorn, 1995, p.117) is a quotation, because I use the exact same words Blankenhorn did. However, when stating that families in the US are increasingly defined by the absence of a father (Blankenhorn, 1995), I only use the idea, not the exact words.

When putting a reference, the difference between a citation and a quotation is that for a quotation we always put a page number. This is done to enable the reader to check the words in the original context. In the list of references at the end of the text, there is no difference.

Short quotations are included in the text, and enclosed by speech marks. Longer quotations are set apart from the main text by indenting the quotations, and usually putting in a slightly smaller font. Longer means about 3 to 4 lines or more. For example:

When quoting someone else, you should take great care to copy the words exactly. Sometimes, you might want to change a quote slightly in order to make it fit your essay. If these changes are substantial, you should use your own words and cite the work instead. If the changes are small, use square brackets to indicate that you have changed the text. For example, you might quote Rawls (1999, p.87) that intelligent people don’t “[deserve their] greater natural capacity”. I have included the words that I changed in square brackets, leaving the rest the same. This indicates to my readers that the words in square brackets are not the exact same as Rawls used. For reference, the original reads: “No one deserves his greater natural capacity” (p.87). I made the changes, because I wrote about intelligent people, and Rawls was talking in more general terms.

Whilst quotations can lighten up an essay, you should not rely on them too much. Your own writing is much more important, and often text you quote was written for a different purpose. The consequence is that the quotations may be relevant in content (what is being said), but in terms of style don’t fit well with what you wrote. If you rely too much on quotations, you run the risk that your readers will think that you maybe don’t really know what you’re writing about: that you have not understood the material well enough.

When to Put the References [ edit | edit source ]

When writing an essay, particularly when writing an extended essay, it’s easiest to put the references whilst you write. This is the case, because you still know where you got the idea from. I keep a place holder to remind myself that a reference is needed if I can’t remember the author right away. Often, I will know at least some of it, and write this down. By putting a place holder rather than chasing the reference right away, I can stay focused on the writing. However, I also indicate that the essay is not completed. Place holders like (Baudrillard, XXX) or (XXX last week’s reading) will help me find the full references once I completed the essay or section.

References are needed whenever you write an academic piece of writing. Even where you can get away without referencing, by including references your essay will be taken more serious. It’s a good habit to put references all the time, so when you really need to—such as in your thesis—you’ll not struggle, or spend days trying to find out how to reference a chapter in a book.

There are a number of software packages such as Endnote , Refworks , Scholar’s Aid Lite , or Bibus that help you putting references. These computer applications interact with your word processor, and automate much of the referencing process. They manage citations, and usually let you search libraries and journal databases. Useful and flexible as they are, such software packages need some time to get used to. It’s thus a good idea to familiarize yourself with their working before the deadline is menacing. For example, make sure you know how to put page numbers for quotations.

Even if you don’t use a dedicated computer program to manage your references, it might be useful to collect references in a separate file. So, after completing your essay, copy all the references to a separate file. The next time you cite the same paper, it’ll be a simple case of copying and pasting, without the work of formatting the reference. Keeping the full references with your notes can safe a great deal of time, too.

Next: Exam essays

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How to Reference in an Essay

In the world of academia, names and dates are important! Just look at your lecture slides. Whenever your lecturer introduces a new theory, they’ll tell you who came up with the theory and when .

So, it’s no surprise that you’d need to do this in your essays, too. Indeed, whenever you refer to someone else’s ideas in your essays, you should cite the author’s surname and the publication date. In some cases, you should cite the page number, too.

The rules of referencing can be confusing, especially if you’re new to higher education. That said, let’s explore the ins-and-outs-of how to reference in an essay provided by experts from our writing service .

Why is referencing important?

Referencing other people’s ideas is important because it:

• Demonstrates you have done wider reading – In turn, this enhances your credibility as a student and as a writer.
• Provides context – More specifically, if you reference the key theories and debates that relate to your essay topic, your tutor will be convinced that you understand the wider contextual issues.
• Helps you think critically – When you reference other people’s work, this encourages you to critically evaluate their findings. Critical evaluation is key to achieving first-class grades.
• Helps you develop an argument – Building upon other people’s ideas helps you to develop a strong argument.
• Prevents plagiarism – Perhaps most importantly, referencing other people’s ideas (rather than copying them) prevents you from being accused of the worst academic sin.

In essence, referencing (when done well), gets you better grades!

Is referencing the same as quoting?

Strictly speaking, whenever you refer to another person’s idea in your essay, this is classed as ‘referencing’. However, it’s important to distinguish between:

• Direct quotes – this is when you quote another person’s ideas verbatim (word-for-word).
• Paraphrasing – this is when you rephrase another person’s ideas in your own words.

This article refers to paraphrasing, though we do offer specific guidance on how to quote in an essay .

What will happen if I don’t reference in my essays?

If you hand in an essay that has no (or very few) references, it’ll look as if you haven’t tried very hard. After all, at degree level, lecturers expect you to be able to do your own research and develop your own arguments.

So, a poorly referenced essay shows that you have not ‘done your homework’. Worse still, if you copy/paraphrase someone else’s ideas without referencing them, you risk being accused of plagiarism.

Having said that, from time-to-time you may be asked to write an assignment without references, such as a reflective report . But these types of assignments are few-and-far-between.

Therefore, it’s best to hone your referencing skills as early as possible. You’ll find this skill particularly useful when it comes to writing your dissertation .

Where should the references go?

Often, students worry about putting the references in the wrong place. But try not to worry too much as the rules of referencing can be learnt.

First and foremost, find out which referencing style your faculty uses. Although there are many different referencing styles, they all fall into two main categories :

• In-text referencing styles
• Footnote referencing styles

Check the tables below for detailed guidance!

Regardless of which style you use, you must provide a ‘reference list’ at the end of your essay. Need some help with this? Learn how to write a reference list for an essay .

Top tips for referencing in an essay

Once you’ve got the hang of the basics, it’s time to hone your referencing skills! Here are some pointers to get you started:

• Strike a balance – A good essay will include a good range of references, but it won’t be stuffed full of names and dates. If you include too many references, you run the risk of producing a list rather than an essay. So, make sure you clearly explain and/or critically evaluate every reference you include in your essay.
• Credibility is key – When selecting materials to include in your essay, make sure they are credible. Journals, academic books, and policy documents tend to be the most credible resources. Some web resources are also acceptable, but these should not feature too heavily in your essay.
• Critically evaluate – As previously mentioned, you should critically evaluate some of the references you use in your essay. This does not mean that you have to rip the author’s ideas to shreds. Rather, you could propose a new application for the author’s theory, or consider their findings from a novel perspective.
• Check your university’s referencing guide – It has been said before, but it’s worth saying again – check your university’s referencing requirements! Many UK universities adopt a variant of Harvard style, with ‘variant’ being the operative word. That’s why it’s so important to check your handbook for specific guidance.

Common mistakes to avoid

Finally, try to avoid the following mistakes when referencing in your essays:

• Referencing the same source many times throughout your essay.
• Including too many citations in the same sentence, thereby making it unclear who said what.
• Paraphrasing half-heartedly, thereby risking plagiarism.
• Forgetting to include necessary information such as the date of the publication or the page number (where applicable).

Typically, referencing is worth between 5 and 15% of your overall marks, so it’s worth getting it right. Plus, in theory, bad referencing could cost you 100% of your marks if you’re accused of plagiarism!

That said, time spent on referencing is time well-spent!

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How many references is enough?

Some reflections on why more references isn't always better, but how strategic referencing might help

Anne-Wil Harzing - Sat 30 May 2020 10:40 (updated Sat 15 Apr 2023 07:23)

Like most senior academics I am reviewing a lot of papers, both for journals where I am on the editorial board and for my junior colleagues in the context of my staff development work at Middlesex . Many of these papers have sentences followed (or interrupted in the middle) by a long and sometimes very long string of references. Most of these papers had well over 100 references in total, which might even lead the paper to be inaccurately classified as a review article by the Web of Science . So I started wondering: How many references is enough?

More isn't always better

My "rule of thumb" has always been to use a maximum of three references to support a particular statement. The role of a literature review is to provide a targeted review of the literature.  In my view, there are several reasons why it is wise not to use too many references:

• It really disturbs the flow of the paper.
• It may provide an implicit signal that your work isn't very interesting or important, as so much has already been published in the field. This means you need to work harder to convince the reviewers you are making a unique contribution.
• It shows that you may not be able to distinguish what the key works in a particular field are and thus are not really that well versed in the literature.
• It does make you look like a bit of a student as having lots of references is quite typical of PhD theses. So it might lead the reviewer to think you are an immature academic writer, which is something you would want to avoid.
• The more references you use (beyond the ones that are really needed to substantiate your argument), the higher the risk that one of the reviewer knows the work you cite better than you do and disagrees with you that this work supports the statement(s) you are making. This might lead the reviewers to be more critical of the rest of the paper as well.

The other side of the coin

On the other hand, there are also good reasons to not be stingy with references.

• You need to demonstrate your thorough knowledge of the field by citing enough of the key references. If the field has been very active, this might mean referencing quite a lot of studies.
• You need to cite the "key people" in a particular field for both intrinsic (this is what is expected in a literature review) and extrinsic reasons (they might be your reviewers and might be annoyed if you have missed their work). However, unless they are intrinsically important, don't "slip in" some references to people you think might be your reviewers by adding them to a block of other references. I have lost count of the number of times a reference to my work really had nothing to do with the content (see also Are referencing errors undermining our scholarship and credibility? ).
• You need to show you are part of the journal "conversation" (see also Why does my paper get a desk-reject time and again? ). Again do this only when the references are intrinsically important. Editors are not stupid, they can  spot easily that you have just added references to their journal last minute after having been rejected at your preferred journal.

General recommendations

As always, looking at your target journal will give you a better feel of the preferences in your sub-discipline (for details of this principle see the slides here: Middlesex University Summer 2019 writing boot-camp ). When doing a final read of the paper, you might also want to reconsider deleting references that you are only citing once and only in connection with a lot of others. These are clearly not essential to your paper. For further guidelines, refer to these - slightly edited - responses to the question: How many references do I need at https://academia.stackexchange.com/ (a very useful site). For general guidance on when to use references see one of my first white papers: Writing coursework assignments

Answer 1: The short and somewhat unsatisfactory answer is: enough

There is no formal limit but obviously too many becomes impractical. If you can reference a huge number of references for a single statement (sentence) it is normal to pick one or possibly a few by using a format indicating these references are just examples, "e.g., Smith et al., 1943; Turner and Anthony, 1963)", "[some statement] by, for example, Smith et al. (1943) and Turner and Anthony (1963)." Exactly when it is reasonable to show examples and when one actually have to show all references is a matter of context. If you, for example, have a series of references that together build up some matter and where none is more important than the other and none summarize the other, it could be necessary to list them all regardless of how many there are. I suggest you try to look at a number of different papers of a similar type (literature review) to the one you are writing to see how others handle such instances. [...] The main point of this is to know when it is sufficient to list only (good) examples rather than all possible references. This is of course a matter of training and learning to assess when which format is appropriate. It is therefore necessary to assess when papers simply duplicate each other (from whatever view point you reference) or when they each contribute something unique that merits their reference.

Answer 2: Don't over do it

A literature review in an article is meant as a general reference, so the reader can get "up to speed" in the state of the art of the topic under discussion. In your thesis, you have to show that you are able to search the literature, you understand it, and are able to extract the important information. If you put every single article, you are not fulfilling any. On the one hand, the reader will not know what are the most relevant articles for your work. On the other front, anyone can get all the articles published in a subfield in the last couple of years and write a sentence, based on the abstract and the figures, in just a few days. In short, show that you have comprehended the literature by finding the most informative subset of articles.

Want to know more about referencing?

I can highly recommend this article by Matthieu Mansard in European Management Review, who distinguishes four key motives of referencing: epistemic, rhetoric, symbolic, and economic.

• Mandard, M (2021). On the shoulders of giants? Motives to cite in management research. European Management Review , DOI: abs/10.1111/emre.12495

Related blogposts

• The four P's of getting published
• The four C's of getting cited
• How to write for US journals with non-US data
• Useful resources when preparing for journal submission
• Why does my paper get a desk-reject time and again?
• Strange journal invitations popping up in my inbox every day
• Are referencing errors undermining our scholarship and credibility?
• Last impressions count too! The importance of conclusions

Find the resources on my website useful?

I cover all the expenses of operating my website privately. If you enjoyed this post and want to support me in maintaining my website, consider buying a copy of one of my books (see below) or  supporting the Publish or Perish software .

Copyright © 2023 Anne-Wil Harzing . All rights reserved. Page last modified on Sat 15 Apr 2023 07:23

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How Many References Do I Need?

When embarking on the journey of writing an article, research paper, or any academic assignment, one common question arises: How many references should be included for a given word count? While there is no one-size-fits-all answer to this question, as the number of references required can vary greatly depending on the topic, depth of research, and type of document, there are general guidelines you can follow.

Table of Contents

Understanding the Role of References

Before diving into numbers, it’s essential to understand the role references play in your writing. References serve multiple purposes:

• Supporting Arguments:  They provide evidence to support your claims and arguments.
• Credibility:  They add credibility to your work by showing you’ve engaged with existing knowledge.
• Acknowledging Sources:  They give proper credit to the original authors of ideas, theories, and research findings.
• Guiding Readers:  They guide readers who wish to explore your sources further.

With these roles in mind, the number of references becomes a balancing act between thoroughness and over-saturation.

General Guidelines Based on Word Count

Short papers (500-1500 words).

For short papers, such as brief reports or reflective essays, you might only need a handful of references, perhaps 5-10. These papers don’t delve deeply into a subject but rather provide an overview or personal insight.

Mid-Length Papers (1500-3000 words)

As the word count increases, so does the expected depth of research. A mid-length paper, like an extended essay or a short research paper, might require anywhere from 10-20 references. This range ensures you have enough sources to provide a solid foundation for your arguments without overwhelming the reader.

Long Papers (3000-6000 words)

For more substantial papers, such as detailed research papers or literature reviews, a good rule of thumb is to have at least one reference for every 100-150 words. This means for a 3,000-word paper, you might have 20-30 references, and for a 6,000-word paper, 40-60 references could be appropriate.

Extended Projects (10,000+ words)

When it comes to dissertations or theses, which can exceed 10,000 words, the number of references can range widely, from 50 to several hundred. The key here is the depth of the study and the number of themes or variables you’re exploring.

Factors Influencing the Number of References

Field of study.

Different academic fields have different expectations for referencing. Humanities papers often rely on a broad range of sources to build arguments, while sciences and social sciences may focus more on recent, peer-reviewed studies.

The Scope of the Topic

A broad overview of a topic will require fewer references than a paper that aims to provide an in-depth analysis of a narrow subject.

Type of Writing

Literature reviews, systematic reviews, and meta-analyses will have a higher reference density than empirical studies, which may rely more on original research data.

Assignment Requirements

Always check if there are specific guidelines or requirements for your assignment. Some instructors may stipulate a minimum or maximum number of references.

Quality Over Quantity

It’s not just about the number of references but their relevance and quality. It’s better to have a smaller number of high-quality, directly related sources than a large number of tangential ones.

The Availability of Sources

Sometimes the topic is so novel or niche that there simply aren’t many sources available. In such cases, it’s important to explain the scarcity of references to your readers.

Calculating the Right Number of References

While there’s no exact formula, you can follow a simple process to estimate the number of references you might need:

• Outline Your Paper:  Break down your paper into sections and list the points you plan to make in each.
• Assign References to Points:  Estimate how many references are needed to support each point adequately.
• Consider the Introduction and Conclusion:  These sections generally require fewer references, if any.
• Add for Breadth and Depth:  Add additional references if you need to provide background context or delve deeper into a topic.

Tips for Managing References

• Start Early:  Begin collecting references early in your research process to ensure you have ample material to choose from.
• Organize Your Sources:  Use reference management software to keep track of your sources and simplify the citation process.
• Annotate Your Bibliography:  Write a brief summary of each source’s key points, which will help you remember why you chose it and how it fits into your paper.

Final Thoughts

The number of references needed for a specific word count is not set in stone. It depends on the purpose of the document, the depth of the discussion, the expectations of the field, and the richness of the topic. The best approach is to use references strategically to bolster your arguments, while also ensuring each reference is meaningful andcontributes to the overall quality of your work.

As you navigate the complex landscape of academic writing, remember that references are the foundation upon which scholarly work is built. They are the threads that weave together the tapestry of knowledge across time and disciplines. Use them wisely, and your writing will not only stand on the shoulders of giants but also invite others to climb up and see further because of your contribution.

About Mr. Greg

Mr. Greg is an English teacher from Edinburgh, Scotland, currently based in Hong Kong. He has over 5 years teaching experience and recently completed his PGCE at the University of Essex Online. In 2013, he graduated from Edinburgh Napier University with a BEng(Hons) in Computing, with a focus on social media.

Mr. Greg’s English Cloud was created in 2020 during the pandemic, aiming to provide students and parents with resources to help facilitate their learning at home.

Whatsapp: +85259609792

[email protected]

How many references should you use in a 4 to 6 page essay?

The best person to ask is your Instructor, to see what his/her expectations are for the essay.  

There is no official rule, as every paper is different with varying requirements specified by the Instructor.

If your Instructor is not clear, here are some general guidelines:

• Usually  3-4 reliable sources  should be sufficient.
• This should be enough external information to complement your original thoughts/ideas.
• With too many sources, the essay becomes a compilation of opinions from other writers instead of your own.

Thank you for using ASK US. Please contact us again if you have more questions.

• Last Updated Sep 24, 2019
• Views 24730
• Answered By Baker Librarians

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