Cita APA

Gude, K., & Duckworth, M. (1994). Proficiency masterclass. Oxford: Oxford University Press.

Chicago Style Citation

Gude, Kathy., i Michael Duckworth. Proficiency Masterclass. Oxford: Oxford University Press, 1994.

Cita MLA

Gude, Kathy., i Michael Duckworth. Proficiency Masterclass. Oxford: Oxford University Press, 1994.

Atenció: Aquestes cites poden no estar 100% correctes.