Cita APA (7a ed.)

Gass, S. M., & Mackey, A. (2012). The Routledge handbook of second language acquisition. Routledge.

Cita Chicago Style (17a ed.)

Gass, Susan M., y Alison Mackey. The Routledge Handbook of Second Language Acquisition. London ; New York, NY: Routledge, 2012.

Cita MLA (9a ed.)

Gass, Susan M., y Alison Mackey. The Routledge Handbook of Second Language Acquisition. Routledge, 2012.