APA引文

Wyatt, R., Duckworth, M., & Gude, K. (1999). Countdown to first certificate. Oxford: Oxford University Press.

Trích dẫn kiểu Chicago

Wyatt, Rawdon., Michael Duckworth, và Kathy Gude. Countdown to First Certificate. Oxford: Oxford University Press, 1999.

MLA引文

Wyatt, Rawdon., Michael Duckworth, và Kathy Gude. Countdown to First Certificate. Oxford: Oxford University Press, 1999.

警告：這些引文格式不一定是100％准確.