Gude, K., & Kathy Gude; Michael Duckworth. (2002). Proficiency Masterclass: Exam practice workbook with key. Oxford: Oxford University Press.
Trích dẫn kiểu ChicagoGude, Kathy, và Kathy Gude; Michael Duckworth. Proficiency Masterclass: Exam Practice Workbook With Key. Oxford: Oxford University Press, 2002.
MLA引文Gude, Kathy, và Kathy Gude; Michael Duckworth. Proficiency Masterclass: Exam Practice Workbook With Key. Oxford: Oxford University Press, 2002.
警告:这些引文格式不一定是100%准确.