APA (7th ed.) Citation

Gass, S. M., Behney, J., & Plonsky, L. (2013). Second language acquisition: An introductory course (Fourth edition.). Routledge.

Chicago Style (17th ed.) Citation

Gass, Susan M., Jennifer Behney, and Luke Plonsky. Second Language Acquisition: An Introductory Course. Fourth edition. New York: Routledge, 2013.

MLA (8th ed.) Citation

Gass, Susan M., et al. Second Language Acquisition: An Introductory Course. Fourth edition. Routledge, 2013.