Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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.

Cita MLA (9th ed.)

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