APA引文

(1989). Listening to toefl: An official toefl study aid. New York: Educational Testing Service.

Trích dẫn kiểu Chicago

Listening to Toefl: An Official Toefl Study Aid. New York: Educational Testing Service, 1989.

MLA引文

Listening to Toefl: An Official Toefl Study Aid. New York: Educational Testing Service, 1989.

警告：這些引文格式不一定是100％准確.