APA (7th ed.) Citation

VanPatten, B., & Williams, J. (2015). Theories in second language acquisition: An introduction (2nd ed.). Routledge.

Chicago Style (17th ed.) Citation

VanPatten, Bill, and Jessica Williams. Theories in Second Language Acquisition: An Introduction. 2nd ed. New York ; London: Routledge, 2015.

MLA (9th ed.) Citation

VanPatten, Bill, and Jessica Williams. Theories in Second Language Acquisition: An Introduction. 2nd ed. Routledge, 2015.