Cita APA (7a ed.)
Thornbury, S., & Harmer, J. (1999). How to: Teach grammar. Longman, Pearson Education Limited.
Cita Chicago Style (17a ed.)
Thornbury, Scott, y Jeremy Harmer. How to: Teach Grammar. [Estados Unidos]: Longman, Pearson Education Limited, 1999.
Cita MLA (9a ed.)
Thornbury, Scott, y Jeremy Harmer. How to: Teach Grammar. Longman, Pearson Education Limited, 1999.
Precaución: Estas citas no son 100% exactas.