Cita APA

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

Chicago Style Citation

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

Cita MLA

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

Atenció: Aquestes cites poden no estar 100% correctes.