TL;DR:
Citations tell readers where your information came from so they can find it.
MLA stresses author and page, APA stresses author and year.
Styles are updated, so confirm the details against your teacher's guide before you submit.
You use a fact from a book in your essay, and your teacher says to cite it. Then you find that two styles exist, and each seems to want the same pieces in a different order. The good news is that the pieces are the same. Learning them once lets you build a citation in either style.
Why we cite
A citation does three things. It gives credit to the person whose work you used. It lets a reader find the source and check it. And it separates your ideas from other people's. Leaving citations out of borrowed ideas is plagiarism, even when you rewrite the words.
The same pieces, in a different order
For a book, both styles need the same facts: author, title, publisher and year. MLA and APA differ in how they arrange and format them.
MLA (often used in English and humanities classes) shows the author's full name, puts the year at the end, and points to a page number in the text.
APA (common in social sciences) shows the author's last name and initials, puts the year right after the author, and also uses the year in the text.
Worked example: one book cited in both styles
The source: Silent Spring, by Rachel Carson, published by Houghton Mifflin in 1962.
Item | MLA | APA |
|---|---|---|
Works Cited or References entry | Carson, Rachel. Silent Spring. Houghton Mifflin, 1962. | Carson, R. (1962). Silent Spring. Houghton Mifflin. |
In-text citation (page 12) | (Carson 12) | (Carson, 1962, p. 12) |
Compare the two entries piece by piece. The author comes first in both, but MLA writes the first name in full and APA uses an initial. The year sits near the front in APA and near the end in MLA. The title is in italics in both, and the publisher name appears in both. The in-text forms reflect the same logic: MLA points to the page, and APA points to the year and adds the page when quoting.
How in-text citations work
A short citation in parentheses in your sentence leads the reader to the full entry in your list at the end. If you name the author in your sentence, you may leave the name out of the parentheses: In MLA, "Carson argues that... (12)." In APA, "Carson (1962) argues that...". The entry in the list is organised alphabetically by the author's last name in both styles.
Verify against the current style guide
Both styles are revised from time to time, and details such as how to treat web pages, publishers, and the layout of the list change between editions. Teachers also sometimes adjust the rules. Use the example above as a pattern for the basic book entry, and check the official style guide, your school's writing centre or your teacher's handout before the final version.
Watch out: Do not rely on an automatic citation generator without reading its output. Generators make mistakes in capitalisation, missing fields and punctuation, and your teacher marks what you hand in.
Collect the details as you read
Citations are easy when you capture the information at the time you read the source. For each source note the author, title, publisher, year, and the page numbers of anything you copy or paraphrase. For websites also note the page title, site name, date and the address. Trying to find these a week later is slow.
Direct quotations versus paraphrase
Both styles treat the two differently. A direct quotation goes inside quotation marks and needs the page number, so the reader can find the exact words. A paraphrase has no quotation marks, but MLA still expects a page number where one exists, and APA strongly encourages one. When you are unsure, include the page: it costs nothing and helps your reader.
A long quotation is set apart as an indented block rather than inside quotation marks, and the length that triggers this rule differs between the styles. This is exactly the kind of detail to confirm in the guide you are using.
Sources with no author
Some sources, such as a web page from an organisation, have no named person. Both styles have a rule for this. Typically the title or the organisation moves into the author's position. Look up the rule for your type of source rather than guessing, since this is where students most often make mistakes.
Common mistakes
Mixing styles in one paper.
Citing in the text but leaving the source out of the list, or the other way round.
Forgetting to cite a paraphrase. An idea needs credit even when the words are yours.
Putting the list in the wrong order. Both styles use alphabetical order by author.
Your plan for this week
Find the style your teacher requires, then build one entry for each book you plan to use, using the pattern above. Keep them in a single file so you can paste them into your list. DuckyHelper can talk through which details a citation needs, but the style guide itself decides how they are laid out.
Frequently asked questions
Which style should I use?
Use the one your teacher assigns. If none is named, ask, or pick one and use it consistently.
Do I cite common knowledge?
Facts that most people know and that appear in many sources usually need no citation. When you are unsure, cite, or ask your teacher.
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