Cita APA (7a ed.)

Harmer, J. (1983). The practice of english language teaching. Longman.

Cita Chicago Style (17a ed.)

Harmer, Jeremy. The Practice of English Language Teaching. London ; New York: Longman, 1983.

Cita MLA (8a ed.)

Harmer, Jeremy. The Practice of English Language Teaching. Longman, 1983.