APA引文

(1991). Cambridge proficiency examination practice 4. Cambridge, UK: Cambridge Univ. Press.

Trích dẫn kiểu Chicago

Cambridge Proficiency Examination Practice 4. Cambridge, UK: Cambridge Univ. Press, 1991.

MLA引文

Cambridge Proficiency Examination Practice 4. Cambridge, UK: Cambridge Univ. Press, 1991.

警告：這些引文格式不一定是100％准確.