एपीए उद्धरण

Helgesen, M., & Brown, S. (1999). Active listening: Building skills for understanding : Level 2 [Đĩa CD-ROM]. Cambridge: Cambridge University Press.

शिकागो स्टाइल उद्धरण

Helgesen, Marc, और Steven Brown. Active Listening: Building Skills for Understanding : Level 2 [Đĩa CD-ROM]. Cambridge: Cambridge University Press, 1999.

एमएलए उद्धरण

Helgesen, Marc, और Steven Brown. Active Listening: Building Skills for Understanding : Level 2 [Đĩa CD-ROM]. Cambridge: Cambridge University Press, 1999.