APA引文

Michael Duckworth. (2000). Countdown to first certificate ( Student's book ). Oxford: Oxford Univ. Press.

Trích dẫn kiểu Chicago

Michael Duckworth. Countdown to First Certificate ( Student's Book ). Oxford: Oxford Univ. Press, 2000.

MLA引文

Michael Duckworth. Countdown to First Certificate ( Student's Book ). Oxford: Oxford Univ. Press, 2000.

警告：這些引文格式不一定是100％准確.