APA (7th ed.) Zitazioa
Harmer, J., Tuffnell, M., Goodman, A., Summers, P., Clifford, A., & Newstead, A. The Practice of English Language Teaching. Pearson.
Chicago Style (17th ed.) Zitazioa
Harmer, Jeremy, Mark Tuffnell, Alex Goodman, Phil Summers, Andy Clifford, eta Amy Newstead. The Practice of English Language Teaching. Essex, Inglaterra: Pearson.
MLA (9th ed.) Zitazioa
Harmer, Jeremy, et al. The Practice of English Language Teaching. Pearson.
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