APA, MLA, Chicago or Harvard — which does your course want?

The honest first answer: your module handbook decides, not this page. Departments specify a style, and a well-formatted reference in the wrong style still loses marks.

But handbooks say “use Harvard” without explaining what that means, and reading lists arrive in whatever style the person who made them happened to use. So it helps to be able to recognise them.

The same book, four ways

Telling them apart in three seconds

Look at the date. It is the fastest tell.

• Straight after the author, in brackets → APA or Harvard
• Straight after the author, no brackets → Chicago author-date
• At the very end → MLA

Then look at the author’s first name. Initials mean APA or Harvard. A full first name means MLA or Chicago.

Then the title’s capitals. Sentence case — only the first word and proper nouns — is APA and Harvard. Title Case With Most Words Capitalised is MLA and Chicago.

APA versus Harvard, which the first two tests do not separate: APA puts a full stop after the bracketed year and does not name the city. Harvard usually has no stop after the year and does include the place of publication.

Which subjects use which

Broadly, and with exceptions everywhere:

APA — psychology, education, nursing, social sciences, business. Anywhere the recency of research matters, which is why the year sits right next to the author.

MLA — English, languages, philosophy, cultural studies, film. Anywhere you are analysing a text rather than reporting a finding. MLA’s in-text citation gives a page number and no year, because for literary analysis where in the text matters more than when it was published.

Chicago — history, art history, theology, and much book publishing. It comes in two distinct forms, which is worth knowing: author-date looks like the example above, while notes-bibliography uses numbered footnotes instead of parenthetical citations. History departments usually mean the second one.

Harvard — the UK default across many subjects, especially business, law and the sciences at British universities.

The in-text citations differ more than the references

This is where a mismatch is most visible to a marker.

MLA’s is the one people get wrong most often, because it looks like something has been left out. It has not: MLA genuinely omits the year in text.

The thing nobody tells you about Harvard

Harvard is not a standard. There is no Harvard committee and no definitive Harvard manual. It is a family of author-date styles, and universities each publish their own variant.

That has a practical consequence: two Harvard guides will genuinely disagree about punctuation, and neither is wrong. If your library publishes a Harvard guide — many use Cite Them Right — that document is your specification, and it beats any generator, including ours.

APA, MLA and Chicago each have a single published manual, so they do not have this problem.

Chicago notes-bibliography, which is what history departments usually mean

Worth its own section, because “use Chicago” and “use Chicago” can mean two structurally different systems, and picking the wrong one is not a formatting slip — it changes how the whole essay is built.

Author-date is the version in the table above: parenthetical citations in the text and a reference list. It is used in the sciences and some social sciences.

Notes-bibliography uses a superscript number in the text and the citation in a footnote at the bottom of the page, with a bibliography at the end. History, art history and theology almost always mean this one.

Three things follow that catch people out. The footnote and the bibliography entry are punctuated differently — the note uses commas and parentheses, the bibliography uses full stops. The first note is full and later ones are shortened to author, short title and page. And the first name comes first in a note but is inverted in the bibliography.

Stated plainly: our citation generator supports Chicago author-date only. If your department wants footnotes, it will produce correctly formatted references in the wrong system, which is worse than no help — use Zotero, which handles notes-bibliography properly, or your library’s own guide.

Vancouver, IEEE and the numbered styles

The fourth family, missing from most comparisons and standard across medicine and engineering.

Instead of naming an author in the text, these number the sources in the order they first appear, and the reference list runs in that number order rather than alphabetically.

Two practical consequences. Insertion renumbers everything after it, so writing these by hand is genuinely painful and a reference manager is close to mandatory for a long piece. And no dates appear in the text at all, which changes how you write: if the recency of a study matters to your argument, you have to say so in the sentence, because the citation will not.

When the reading list disagrees with the handbook

Common, and it unsettles people more than it should.

Reading lists are usually assembled from publisher metadata, previous years’ lists and whatever the module leader had to hand, so they drift. The handbook wins. It is the document your work is marked against; the reading list is a set of pointers to books.

If the handbook is genuinely silent — it happens with dissertations and independent projects — then the reading list is reasonable evidence of what the department reads comfortably, and either is defensible as long as you pick one and hold to it.

Which to choose if nobody has told you

Rare, but it happens with independent projects and dissertations at some institutions.

1. Look at your reading list. Whatever your department cites in is what they are used to reading.
2. Ask the module leader. A two-line email, and it removes the risk entirely.
3. Failing both, match your discipline from the list above.

Then — and this matters more than the choice — be consistent. A marker will forgive a department-preferred style you did not use. They will not forgive a bibliography that is APA at the top and MLA at the bottom, because that reads as carelessness rather than convention.

Switching between them

If you have written in one style and need another, do not retype the references. Our citation generator holds your sources as structured data — author, title, year, publisher — and renders them in APA 7, MLA 9, Chicago 17 or Harvard from the same entry. Switching styles is one click, and your whole bibliography changes with it.

It imports RIS and BibTeX too, so references already in Zotero, Mendeley or EndNote can come across rather than being rekeyed.

One limitation stated plainly: Chicago notes-bibliography — the numbered-footnote form — is not supported. If your history department wants footnotes, our Chicago output is not what you need.