Gude, K., & Duckworth, M. (2002). Proficiency masterclass: Student's book. Oxford: Oxford University Press.
Chicago Style CitationGude, Kathy, and Michael Duckworth. Proficiency Masterclass: Student's Book. Oxford: Oxford University Press, 2002.
MLA CitationGude, Kathy, and Michael Duckworth. Proficiency Masterclass: Student's Book. Oxford: Oxford University Press, 2002.
Warning: These citations may not always be 100% accurate.