📖 English

Citing Sources: MLA, APA and Harvard Basics for Essays

Find reliable sources, avoid plagiarism by quoting and paraphrasing correctly and understand common citation styles.

  • ⏱ 3 min read
  • ✏️ 3 worked examples
  • 🎯 5 practice questions
  • 📶 Intermediate
GCSEA-LevelHigh SchoolAP

Curriculum fit: GCSE English Language (using evidence and sources); high school and AP research writing. US: Common Core ELA Writing standards (research to build knowledge, grades 9-12).

On this page

What Is It?

Research writing uses evidence from other people's work to support your ideas. It is important to find reliable sources, use them accurately and give credit to the original author.

Plagiarism means presenting someone else's words or ideas as your own. You avoid it by quoting, paraphrasing and citing correctly.

Quoteexact wordsin quotation marksParaphrasethe idea inyour own wordsSummarisethe main points,brieflyall three need a citationMLAoften EnglishAPAoften social scienceHarvardcommon in the UK
Whichever method you use, cite the source. Use the citation style your teacher or school asks for.

Key Formulas and Ideas

  • Quote: copy exact words in quotation marks and cite the source.
  • Paraphrase: restate the idea in your own words and still cite the source.
  • Summarise: give the main points briefly, in your own words, with a citation.
  • Common citation styles: MLA (often used in English and humanities), APA (often used in social sciences) and Harvard (common in UK institutions). Always use the style your teacher or school requires.

Worked Examples

Example 1

Paraphrase

Question

Paraphrase: 'Sleep strengthens memory by helping the brain organise new information.'

  1. Understand the idea.
  2. Change the wording and structure, but keep the meaning.
  3. Add a citation.

✓ Answer Getting enough sleep helps the brain sort and store what we have recently learned (Author, Year).

Example 2

Basic Book Entry

Question

Show the general pattern of a book entry in MLA and APA.

  1. MLA: Author last name, First name. Title of Book. Publisher, Year.
  2. APA: Author last name, Initial. (Year). Title of book. Publisher.

✓ Answer The two styles order and format the same information differently

Example 3

Credibility

Question

Which source is more reliable for a history essay: a university press book or an anonymous forum post?

  1. Check the author's expertise and whether the source is reviewed.
  2. A university press book is edited and reviewed.

✓ Answer The university press book

Common Mistakes to Avoid

  • Copying text from a website without quotation marks.
  • Changing only a few words and calling it a paraphrase.
  • Citing a source without checking that it is reliable.
  • Using different citation styles in the same essay.

Practice Questions

0 of 5 answered
Q1Plagiarism is…
Q2When you quote, you must…
Q3A paraphrase needs…
Q4Which source is likely to be more reliable?
Q5MLA, APA and Harvard are…

Frequently Asked Questions

Do I need to cite a paraphrase?

Yes. The idea still comes from someone else, so you must credit it.

Which citation style should I use?

Use the style your teacher, school or exam board asks for, and check its latest guidelines.

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Sources and Review

Reviewed by StudyMorrow editorial review on 5 Nov 2026.