APA ציטוט

Duckworth, M. (2008). Countdown to first certificate: (Workbook with key). Oxford: Oxford University Press.

Trích dẫn kiểu Chicago

Duckworth, Michael. Countdown to First Certificate: (Workbook With Key). Oxford: Oxford University Press, 2008.

ציטוט MLA

Duckworth, Michael. Countdown to First Certificate: (Workbook With Key). Oxford: Oxford University Press, 2008.