Helgesen, M., & Brown, S. (1999). Active listening: Introducing skills for understanding. Cambridge University Press.
Citazione stile Chigago Style (17a edizione)Helgesen, Marc, e Steven Brown. Active Listening: Introducing Skills for Understanding. Cambridge [England] ; New York, NY: Cambridge University Press, 1999.
Citatione MLA (8a ed.)Helgesen, Marc, e Steven Brown. Active Listening: Introducing Skills for Understanding. Cambridge University Press, 1999.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.