APA引文

Littlejohn, A. (1999). Cambridge English worldwide: Listening and speaking pack. Cambridge, UK: Cambridge University Press.

Trích dẫn kiểu Chicago

Littlejohn, Andrew. Cambridge English Worldwide: Listening and Speaking Pack. Cambridge, UK: Cambridge University Press, 1999.

MLA引文

Littlejohn, Andrew. Cambridge English Worldwide: Listening and Speaking Pack. Cambridge, UK: Cambridge University Press, 1999.

警告：这些引文格式不一定是100％准确.