APA (7th ed.) Citation

Cook, V., & Singleton, D. M. (2014). Key topics in second language acquisition. Multilingual Matters.

Chicago Style (17th ed.) Citation

Cook, Vivian, and D. M. Singleton. Key Topics in Second Language Acquisition. Bristol, England: Multilingual Matters, 2014.

MLA (9th ed.) Citation

Cook, Vivian, and D. M. Singleton. Key Topics in Second Language Acquisition. Multilingual Matters, 2014.