APA (7th ed.) Citation

Harmer, J. (1991). The practice of English language teaching (New ed.). Longman.

Chicago Style (17th ed.) Citation

Harmer, Jeremy. The Practice of English Language Teaching. New ed. London: Longman, 1991.

MLA (9th ed.) Citation

Harmer, Jeremy. The Practice of English Language Teaching. New ed. Longman, 1991.