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