APA (7th ed.) Citation

Gude, K., Duckworth, M., & Rogers, L. (2012). Cambridge English Proficiency masterclass: Student's book with online skills & language practice : for the 2013 exam. Oxford University Press.

Chicago Style (17th ed.) Citation

Gude, Kathy, Michael Duckworth, and Louis Rogers. Cambridge English Proficiency Masterclass: Student's Book with Online Skills & Language Practice : For the 2013 Exam. Oxford: Oxford University Press, 2012.

MLA (9th ed.) Citation

Gude, Kathy, et al. Cambridge English Proficiency Masterclass: Student's Book with Online Skills & Language Practice : For the 2013 Exam. Oxford University Press, 2012.