APA ציטוט

Duckworth, M. (2009). Countdown to first certificate. Oxford: Oxford University Press.

Trích dẫn kiểu Chicago

Duckworth, Michael. Countdown to First Certificate. Oxford: Oxford University Press, 2009.

ציטוט MLA

Duckworth, Michael. Countdown to First Certificate. Oxford: Oxford University Press, 2009.