APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

ProQuest (Firm), Susan M. Gass, and Alison Mackey. The Routledge Handbook of Second Language Acquisition. London ; New York, NY: Routledge, 2012.

MLA (9th ed.) Citation

ProQuest (Firm), et al. The Routledge Handbook of Second Language Acquisition. Routledge, 2012.

Warning: These citations may not always be 100% accurate.