APA (7th ed.) Citation

Gude, K., & Duckworth, M. (2002). Proficiency masterclass: Exam practice workbook : with key : [Cassette]. Oxford University Press.

Chicago Style (17th ed.) Citation

Gude, Kathy, and Michael Duckworth. Proficiency Masterclass: Exam Practice Workbook : With Key : [Cassette]. Oxford: Oxford University Press, 2002.

MLA (9th ed.) Citation

Gude, Kathy, and Michael Duckworth. Proficiency Masterclass: Exam Practice Workbook : With Key : [Cassette]. Oxford University Press, 2002.

Warning: These citations may not always be 100% accurate.