Gude, K. (1994). Proficiency Masterclass. Oxford: Oxford University Press.
Trích dẫn kiểu ChicagoGude, Kathy. Proficiency Masterclass. Oxford: Oxford University Press, 1994.
MLA引文Gude, Kathy. Proficiency Masterclass. Oxford: Oxford University Press, 1994.
警告：這些引文格式不一定是100％准確.