Cita APA

Marc Helgesen. (1994). Active listening building: Skills for understanding (teacher's edition 2). Cambridge, UK: Cambridge Univ. press.

Citación estilo Chicago

Marc Helgesen. Active Listening Building: Skills for Understanding (teacher's Edition 2). Cambridge, UK: Cambridge Univ. press, 1994.

Cita MLA

Marc Helgesen. Active Listening Building: Skills for Understanding (teacher's Edition 2). Cambridge, UK: Cambridge Univ. press, 1994.