Style de citation APA (7e éd.)

Gude, K., & Duckworth, M. (2002). Proficiency masterclass: Student's book. Oxford University Press.

Style de citation Chicago (17e éd.)

Gude, Kathy, et Michael Duckworth. Proficiency Masterclass: Student's Book. Oxford: Oxford University Press, 2002.

Style de citation MLA (8e éd.)

Gude, Kathy, et Michael Duckworth. Proficiency Masterclass: Student's Book. Oxford University Press, 2002.