APA引文

An Official TOEFL Study Aid. (1989). Listening to TOEFL: Workbook. USA: Educational Testing Service.

Trích dẫn kiểu Chicago

An Official TOEFL Study Aid. Listening to TOEFL: Workbook. USA: Educational Testing Service, 1989.

MLA引文

An Official TOEFL Study Aid. Listening to TOEFL: Workbook. USA: Educational Testing Service, 1989.

警告：這些引文格式不一定是100％准確.