APA引文

Helgesen, M., Brown, S., & Smith, D. (1999). Active listening: Expanding understanding through content : Level 3 [Đĩa CD-ROM]. Cambridge: Cambridge University Press.

Trích dẫn kiểu Chicago

Helgesen, Marc, Steven Brown, và Dorolyn Smith. Active Listening: Expanding Understanding Through Content : Level 3 [Đĩa CD-ROM]. Cambridge: Cambridge University Press, 1999.

MLA引文

Helgesen, Marc, Steven Brown, và Dorolyn Smith. Active Listening: Expanding Understanding Through Content : Level 3 [Đĩa CD-ROM]. Cambridge: Cambridge University Press, 1999.