Cita APA (7th ed.)

Harmer, J. (2007). How to: Teach english. Pearson Education.

Cita Chicago (17th ed.)

Harmer, Jeremy. How to: Teach English. Essex: Pearson Education, 2007.

Cita MLA (9th ed.)

Harmer, Jeremy. How to: Teach English. Pearson Education, 2007.