Cita APA (7th ed.)

Helgesen, M., & Brown, S. (1999). Active listening: Introducing skills for understanding. Cambridge University Press.

Cita Chicago (17th ed.)

Helgesen, Marc, i Steven Brown. Active Listening: Introducing Skills for Understanding. Cambridge [England] ; New York, NY: Cambridge University Press, 1999.

Cita MLA (8th ed.)

Helgesen, Marc, i Steven Brown. Active Listening: Introducing Skills for Understanding. Cambridge University Press, 1999.