APA引文

Black, M. (2006). Objective IELTS Student's Book. Intermediate. Cambridge University Press.

Trích dẫn kiểu Chicago

Black, Michael. Objective IELTS Student's Book. Intermediate. Cambridge University Press, 2006.

MLA引文

Black, Michael. Objective IELTS Student's Book. Intermediate. Cambridge University Press, 2006.

警告：這些引文格式不一定是100％准確.