APA (7th ed.) Citation

Thornbury, S., & Watkins, P. (2014). The CELTA course: Certificate in English language teaching to adults : trainee book (8th printing.). Cambridge University Press.

Chicago Style (17th ed.) Citation

Thornbury, Scott, and Peter Watkins. The CELTA Course: Certificate in English Language Teaching to Adults : Trainee Book. 8th printing. Cambridge: Cambridge University Press, 2014.

MLA (9th ed.) Citation

Thornbury, Scott, and Peter Watkins. The CELTA Course: Certificate in English Language Teaching to Adults : Trainee Book. 8th printing. Cambridge University Press, 2014.