Cita APA (7a ed.)
Harmer, J. (1991). The practice of english language teaching (New ed.). Longman Group UK.
Cita Chicago Style (17a ed.)
Harmer, Jeremy. The Practice of English Language Teaching. New ed. London: Longman Group UK, 1991.
Cita MLA (9a ed.)
Harmer, Jeremy. The Practice of English Language Teaching. New ed. Longman Group UK, 1991.
Precaución: Estas citas no son 100% exactas.