APA引文

Balck, M. (2006). Objective IELTS: Intermediate. Cambridge: Cambridge University Press.

Trích dẫn kiểu Chicago

Balck, Michael. Objective IELTS: Intermediate. Cambridge: Cambridge University Press, 2006.

MLA引文

Balck, Michael. Objective IELTS: Intermediate. Cambridge: Cambridge University Press, 2006.

警告：這些引文格式不一定是100％准確.