Gude, K., & Duckworth, M. (1994). Proficiency masterclass: Teacher's book. Oxford: Oxford University Press.
Chicago Style CitationGude, Kathy., and Michael Duckworth. Proficiency Masterclass: Teacher's Book. Oxford: Oxford University Press, 1994.
MLA CitationGude, Kathy., and Michael Duckworth. Proficiency Masterclass: Teacher's Book. Oxford: Oxford University Press, 1994.
Warning: These citations may not always be 100% accurate.