APA ציטוט

(1989). Understanding TOEFL: An official TOEFL study aid. Princeton: Educational testing service.

Trích dẫn kiểu Chicago

Understanding TOEFL: An Official TOEFL Study Aid. Princeton: Educational testing service, 1989.

ציטוט MLA

Understanding TOEFL: An Official TOEFL Study Aid. Princeton: Educational testing service, 1989.