APA (7th ed.) Citation

Tarone, E., & Yule, G. (1989). Focus on the language learner. Oxford University Press.

Chicago Style (17th ed.) Citation

Tarone, Elaine, and George Yule. Focus on the Language Learner. Oxford: Oxford University Press, 1989.

MLA (9th ed.) Citation

Tarone, Elaine, and George Yule. Focus on the Language Learner. Oxford University Press, 1989.