APA-referens

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

Chicago-stil citat

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

MLA-referens

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

Varning: dessa hänvisningar är inte alltid fullständigt riktiga.