Cita APA (7a ed.)

Thornbury, S. (2013). How to teach speaking (11th impression.). Pearson Education.

Cita Chicago Style (17a ed.)

Thornbury, Scott. How to Teach Speaking. 11th impression. Harlow: Pearson Education, 2013.

Cita MLA (9a ed.)

Thornbury, Scott. How to Teach Speaking. 11th impression. Pearson Education, 2013.