What this guide covers
- Why citing sources matters
- Citation, reference, bibliography — the terms
- The main referencing styles, compared
- The anatomy of a citation
- How to cite a journal article (worked examples)
- How to cite books, chapters & websites
- Tools that do the formatting for you
- Common mistakes students make
- How FRELIP helps
- FRELIP fact-check report
- Sources
Why citing sources matters
Referencing is not a bureaucratic hoop your lecturer invented to punish you. It does three real jobs, and understanding them makes every other rule easier to follow.
It gives credit and avoids plagiarism. When you use someone else’s idea, data, argument or exact words, citing them acknowledges the debt. Failing to do so — even accidentally, even from a website — is plagiarism, an academic-integrity offence that can cost you marks, a module, or in serious cases your place on a programme. A citation is your defence: it shows precisely where your material ends and someone else’s begins.
It lets a reader verify your claims. A reference is a set of directions. It should carry enough detail — author, year, title, where it was published — that anyone can trace the exact source you used and check that it says what you say it says. That traceability is the whole basis of trust in academic writing.
It shows the reader you have done the reading. A well-referenced essay signals that your argument sits inside a wider conversation. Markers reward this: it demonstrates research, not just opinion. In short, citing sources protects you, informs your reader, and strengthens your grade all at once.
Citation, reference, bibliography — the terms
Students trip over these three words constantly, often because different lecturers use them loosely. Here is the clean distinction most style guides work with.
| Term | What it is | Where it lives |
|---|---|---|
| In-text citation | The short marker inside your sentence pointing to a source — e.g. (Okafor, 2021) or a superscript number. | In the body of your writing, right where you use the source. |
| Reference | The full description of one source — author, year, title, publication details — enough to find it. | In the list at the end. |
| Reference list | The list of only the sources you actually cited in the text. | End of the document (APA, MLA call it “References” / “Works Cited”). |
| Bibliography | A list of everything you consulted, whether or not you cited it directly. | End of the document — used by some styles (e.g. Chicago) and some assignments. |
The key rule: every in-text citation must have a matching entry in your reference list, and every entry must have been cited in the text. The two halves are a pair. Markers check this correspondence, and citation software enforces it automatically.
The main referencing styles, compared
A “referencing style” is simply an agreed set of rules for how you format those citations and references. Different disciplines favour different styles, so the first thing to do for any assignment is find out which style your department requires — check the assignment brief or module handbook, and use that one consistently throughout. Never mix styles in one document.
| Style | In-text system | Typically used in |
|---|---|---|
| APA (7th ed.) | Author–date: (Author, Year) | Psychology, education, social & health sciences, nursing, business |
| MLA (9th ed.) | Author–page: (Author 23) | Literature, languages, arts & humanities |
| Chicago (notes) | Footnotes/endnotes + bibliography | History, some humanities |
| Harvard | Author–date (Author, Year) | A family of author–date styles common in UK & Nigerian universities; exact format varies by institution |
| Vancouver | Numbered: [1] in order of appearance | Medicine, biomedical & many hard sciences |
| IEEE | Numbered: [1] in square brackets | Engineering, computing |
Unlike APA or MLA — which are published by a single body with an official manual — “Harvard referencing” is a general author–date approach with no single governing authority. That is why one university’s Harvard guide can differ from another’s in punctuation and order. If your department says “use Harvard,” follow your institution’s own Harvard guide, not a random one online.
The anatomy of a citation
Whatever the style, a citation almost always has two connected parts. Get this mental model and the specific rules become details rather than mysteries.
Author–date styles let you cite in two voices. A parenthetical citation puts everything in brackets: Open access widens readership in low-income regions (Nwosu, 2022). A narrative citation weaves the author into your sentence: Nwosu (2022) found that open access widens readership in low-income regions. Use narrative citations when the author matters to your point, parenthetical when the finding matters more than who said it.
How to cite a journal article (worked examples)
The journal article is the source students cite most and get wrong most, so here it is in full, in the two most common styles. Watch what is capitalised, what is italicised, and where the DOI goes.
APA 7th edition
APA capitalises only the first word of the article title (and any proper nouns), italicises the journal name and volume number, and ends with the DOI as a full https://doi.org/… link.
Note the pattern: Author(s). (Year). Title of the article. Title of the Journal, Volume(Issue), page–range. https://doi.org/xxxx. For two authors, join them with an ampersand (&) in the reference and in a parenthetical citation, but with the word “and” in a narrative one. With three or more authors, name the first followed by “et al.” in the text — (Okafor et al., 2021).
MLA 9th edition
MLA uses title case (major words capitalised), puts the article title in quotation marks, italicises the journal, and abbreviates volume and issue as “vol.” and “no.” The DOI is given, often prefixed “https://doi.org/”.
A DOI (Digital Object Identifier) is a permanent link to the article that will not rot the way a normal URL does. Modern APA and MLA both want the DOI in the reference when one exists. If you are not sure what a DOI is or how to find it, our companion explainer What is a DOI? walks through it.
How to cite books, chapters & websites
Once you can see the shape of a reference, other source types are variations on the theme. Here are the three you will need most, in APA 7th edition.
For a web page, give the author (which may be an organisation), the date it was published or last updated, the page title in italics, the site name where it differs from the author, and the full URL. If a page has no date, use “(n.d.)”. Never cite “www.google.com” — cite the actual page you took the information from, not the search engine or homepage that led you there.
If you use a generative-AI tool such as ChatGPT, most style guides now treat it as a source you must disclose and cite, not a hidden shortcut — and many lecturers restrict or forbid it. Wikipedia is a starting point, not a citable academic source: follow its own references down to the original, and cite that instead.
Tools that do the formatting for you
You do not have to format references by hand. Reference-management software stores your sources, inserts in-text citations as you write, and builds the reference list automatically in whatever style you choose — switching from APA to MLA in one click.
Even the best tool is only as good as the data it pulls. Always eyeball a generated reference against the rules above — check the author order, the capitalisation, the italics and the DOI. A marker will spot a broken auto-citation instantly, and “the software did it” is not a defence.
Common mistakes students make
A handful of errors account for most of the marks students lose on referencing. Avoid these and you are most of the way there.
| The mistake | Why it hurts | The fix |
|---|---|---|
| Mixing styles | Half the essay in APA, half in Harvard, looks careless and costs marks for consistency. | Confirm the required style first, and apply it — one style — throughout. |
| In-text and list don’t match | A source cited in the text but missing from the list (or vice versa) is a flagged error every time. | Every in-text citation needs one matching reference entry, and no orphans in the list. |
| Quoting without a page number | Direct quotations in author–date styles need a page (or paragraph) locator; leaving it out weakens the citation. | Add the page for every direct quote — (Author, Year, p. 12). |
| Paraphrasing without citing | Rewording someone’s idea in your own words still needs a citation — dropping it is still plagiarism. | Cite the source whenever the idea is not your own, quoted or not. |
| Trusting an auto-generator blindly | Generators mangle capitalisation, author order and DOIs. | Always proofread generated references against the style rules. |
| Citing the homepage, not the page | “Available at: www.site.com” gives the reader no way to find the actual source. | Cite the specific page, with its title and full URL or DOI. |
How FRELIP helps
Referencing well starts with finding sources worth referencing — credible, traceable, and ideally free to read. That is exactly what FRELIP is built to help African students and researchers do.
- Sources you can actually cite. FRELIP indexes open-access scholarship — journal articles, theses and textbooks — that are free to read and come with clean, complete metadata (author, year, journal, DOI), which is precisely the information a reference needs.
- The DOI connection. Because open scholarship carries persistent identifiers, the references you build from it stay findable for the reader. See our DOI explainer for why that matters.
- A research-skills series. This guide is one of a FRELIP set on the practical craft of research — finding sources, citing them, understanding open access, and building a researcher identity with ORCID.
The takeaway is simple. Find out which style your department wants, learn its shape once — in-text pointer plus a full reference — cite every idea that is not your own, and let a free tool like Zotero handle the fiddly formatting. Do that and referencing stops being a source of anxiety and becomes what it is meant to be: proof that your work is honest, careful and part of a bigger conversation.
FRELIP fact-check report
Every formatting rule and worked example in this guide was checked against the official style authorities — the APA Style website, the MLA Style Center and The Chicago Manual of Style. We separate what those primary sources confirm from what varies by institution.
Verified Confirmed by official style authorities
- APA 7th edition (published 2019/2020) uses an author–date in-text system: (Author, Year), with a page number for direct quotations. (apastyle.apa.org)
- APA journal-article references use sentence case for the article title, italicise the journal title and volume, and include the DOI as a https://doi.org/ link when available. (apastyle.apa.org — journal article references)
- APA uses “et al.” for works with three or more authors in the in-text citation. (apastyle.apa.org — in-text citations)
- MLA 9th edition uses an author–page in-text system and a “Works Cited” list; article titles go in quotation marks, journal titles in italics, with “vol.” and “no.” labels. (style.mla.org)
- Chicago offers two systems — notes-and-bibliography and author–date. (chicagomanualofstyle.org)
- Vancouver and IEEE are numeric styles that cite sources by number in order of appearance. (NLM / IEEE style guidance)
- A reference list contains only sources cited in the text; a bibliography may list everything consulted. (APA & general academic-style guidance)
Hedged Correct in general, but varies by institution
- “Harvard referencing.” Harvard is a family of author–date styles with no single governing manual; exact punctuation and ordering differ between universities. Always follow your own institution’s Harvard guide.
- Which style a course requires. The disciplines listed (e.g. APA for psychology, MLA for literature) are typical, not universal — departments set their own requirement, so confirm it in your brief or handbook.
- Citing generative-AI tools. Guidance is evolving; APA and MLA have published formats, but individual lecturers and universities set their own rules on whether AI use is permitted at all.
Excluded Claims we deliberately did not make
- A single “correct” citation style. There is none — the correct style is the one your department specifies. We do not claim any style is universally required.
- That any citation generator is fully reliable. We do not endorse auto-generated references as accurate without human checking, because they routinely contain formatting errors.
- Named real DOIs in examples. The DOIs shown are illustrative placeholders, not live identifiers, to avoid pointing readers to a real article we did not verify.
Sources
2. APA Style — Journal article references ↗
3. APA Style — Reference examples (books, web pages) ↗
4. MLA Style Center — Works Cited: a quick guide ↗
5. MLA Style Center — What’s new in the ninth edition ↗
6. The Chicago Manual of Style — Citation Quick Guide ↗
7. NLM / Vancouver — Citing Medicine (numbered references) ↗
8. Zotero — free, open-source reference manager ↗
This is an educational guide to citing sources; it is not affiliated with or endorsed by APA, MLA or the University of Chicago Press. Spotted something to correct? Tell us.
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