Duckworth M. Michael & Gude K. Kathy. (2009). Countdown to First Certificate: Student's book. Oxford, Oxford University Press, 2009.
Chicago Style (17th ed.) CitationDuckworth M. Michael and Gude K. Kathy. Countdown to First Certificate: Student's Book. Oxford, Oxford University Press, 2009, 2009.
MLA (9th ed.) CitationDuckworth M. Michael and Gude K. Kathy. Countdown to First Certificate: Student's Book. Oxford, Oxford University Press, 2009, 2009.
Warning: These citations may not always be 100% accurate.