APA (7th ed.) Citation

Gude K. Kathy & Duckworth M. Michael. (2003). Proficiency Masterclass: Student's Book (3-rd ed.). New York, Oxford University Press, 2003.

Chicago Style (17th ed.) Citation

Gude K. Kathy and Duckworth M. Michael. Proficiency Masterclass: Student's Book. 3-rd ed. New York, Oxford University Press, 2003, 2003.

MLA (9th ed.) Citation

Gude K. Kathy and Duckworth M. Michael. Proficiency Masterclass: Student's Book. 3-rd ed. New York, Oxford University Press, 2003, 2003.