APA引文

Doff, A. (2011). English unlimited A2: Elementary self-study pack. Cambridge: Cambridge University Press.

Trích dẫn kiểu Chicago

Doff, Adrian. English Unlimited A2: Elementary Self-study Pack. Cambridge: Cambridge University Press, 2011.

MLA引文

Doff, Adrian. English Unlimited A2: Elementary Self-study Pack. Cambridge: Cambridge University Press, 2011.

警告：这些引文格式不一定是100％准确.