Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (8a ed.)

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