Citazione Stile APA (7a Edizione)

Harmer, J. (1991). The practice of English language teaching (New ed.). Longman Distributed in the U.S.A by Longman Pub.

Citazione stile Chigago Style (17a edizione)

Harmer, Jeremy. The Practice of English Language Teaching. New ed. London, New York, New York: Longman Distributed in the U.S.A by Longman Pub, 1991.

Citatione MLA (9a ed.)

Harmer, Jeremy. The Practice of English Language Teaching. New ed. Longman Distributed in the U.S.A by Longman Pub, 1991.