(1989). Understanding TOEFL: An official TOEFL study aid. Princeton: Educational testing service.
Trích dẫn kiểu ChicagoUnderstanding TOEFL: An Official TOEFL Study Aid. Princeton: Educational testing service, 1989.
ציטוט MLAUnderstanding TOEFL: An Official TOEFL Study Aid. Princeton: Educational testing service, 1989.
אזהרה: ציטוטים אלה לעיתים לא מדויקים ב 100%.