Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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