APA (7th ed.) Citation

Thornbury & Harmer. (2002). How to teach vocabulary. Longman.

Chicago Style (17th ed.) Citation

Thornbury and Harmer. How to Teach Vocabulary. London: Longman, 2002.

MLA (9th ed.) Citation

Thornbury and Harmer. How to Teach Vocabulary. Longman, 2002.

Warning: These citations may not always be 100% accurate.