APA引文

Widdowson, H. G. (1991). Aspects of language teaching. Oxford: Oxford University Press.

Trích dẫn kiểu Chicago

Widdowson, H. G. Aspects of Language Teaching. Oxford: Oxford University Press, 1991.

MLA引文

Widdowson, H. G. Aspects of Language Teaching. Oxford: Oxford University Press, 1991.

警告：这些引文格式不一定是100％准确.