APA引文

Roberts, R. (2004). IELTS foundation. Oxford: Macmillan.

Trích dẫn kiểu Chicago

Roberts, Rachael. IELTS Foundation. Oxford: Macmillan, 2004.

MLA引文

Roberts, Rachael. IELTS Foundation. Oxford: Macmillan, 2004.

警告：這些引文格式不一定是100％准確.