May P. Peter & Sayer M. Mike. (2002). Towards proficiency: Workbook with key. New York, Oxford University Press, 2002.
Chicago Style (17th ed.) CitationMay P. Peter and Sayer M. Mike. Towards Proficiency: Workbook with Key. New York, Oxford University Press, 2002, 2002.
MLA (9th ed.) CitationMay P. Peter and Sayer M. Mike. Towards Proficiency: Workbook with Key. New York, Oxford University Press, 2002, 2002.
Warning: These citations may not always be 100% accurate.