APA ציטוט

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.

ציטוט MLA

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