Trích dẫn APA

Duncan, J. (2007). Open forum 3: Academic listening and speaking: CDS 1-3: 3 CD. American: Oxford University.

Trích dẫn kiểu Chicago

Duncan, Janie. Open Forum 3: Academic Listening and Speaking: CDS 1-3: 3 CD. American: Oxford University, 2007.

MLA Trích dẫn

Duncan, Janie. Open Forum 3: Academic Listening and Speaking: CDS 1-3: 3 CD. American: Oxford University, 2007.

Warning: These citations may not always be 100% accurate.