Academic writing – compared to some other types of writing – builds on the earlier, published work of others. Authors take the ideas and evidence come from studies, books, and reliable websites to create their own arguments.
The process of creating references and using citations allows the writer to show where those ideas originated and allow readers to find the original works. Giving proper credit to others strengthens your own credibility and protects you from plagiarism – the use of another person’s work without acknowledgment.
This article explores what you will want to cite and why you shouldn't be nervous about adding citations to your work. It'll also cover a few quick rules that make decisions around citations simpler.
What this article covers
Why citation matters
What needs a citation
What is commonly known
A short decision checklist
Why citation matters
When you write a paper, you’re not just sharing your opinion – you’re making an argument. And like any good argument, it needs evidence.
Citing your sources shows that your ideas are supported by research. If your reader wants to check your facts or see where an idea came from, they can follow your citation to the full reference and review the original material themselves. That’s how academic writing works – someone proposes an idea, others review the evidence, and the idea either holds up or it doesn’t.
That’s also exactly what your professor is doing when they grade your paper. You’re putting forward a thesis, supporting it with research, and being evaluated on how well you build your case. Citing your sources makes your ideas stronger by showing that they’re grounded in credible evidence.
In summary:
Citations support claims with evidence – they link statements to sources.
Citations build trust – readers can verify the source.
Citations prevent plagiarism – credit is given where it is due.
When sources are cited well, the paper reads as careful and honest which is a strong foundation for any argument.
What needs a citation
Here’s a simple rule: If it’s not your original idea or a widely known fact, you should probably cite it.
That includes:
- Direct quotes
- Paraphrased or summarized ideas
- Data or statistics
- Images, charts, or graphs you didn’t create
Basically, if it came from another source and it helped shape your thinking or your paper, give credit where it’s due.
And don’t worry – citing other people’s work doesn’t weaken your paper. It actually strengthens it. It shows that you’ve done your research and are building on the work of others. Even if your entire idea is a new combination of things other people have said – that’s still valid and original, and worth sharing.
What does not need a citation (usually)
Common knowledge – facts widely known and easily verified (for example, “Water freezes at 0°C”).
Own analysis or original examples that do not depend on a source.
When uncertain, the safer choice is to cite – clarity beats guesswork.
Quick decision checklist
▢ Is the wording a direct quote? Cite with author, year, and page.
▢ Is the idea paraphrased or summarized? Cite with author and year.
▢ Does the material include data, images, or figures from a source? Cite.
▢ Is the claim common knowledge? If not sure, treat it as a citeable claim.
▢ Does every in-text citation match an entry on the References page?
With PERRLA
PERRLA pairs in-text citations with their matching References page entries automatically for you. Citations are always inserted with the correct punctuation, spacing, & formatting. They also stay updated as the draft grows & when references change.
Download PERRLA's APA 7 Checklist
It's a lot to remember all the rules, and if you aren't letting PERRLA do the formatting for you, use our brief checklist for your next APA 7 paper. Click here to get your copy now!
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Note for instructors & studenst: This article follows APA 7 student paper conventions; course policies on plagiarism and citation may vary.