Cita APA (7th ed.)

Helgesen, M., Brown, S., & Smith, D. Active listening. expanding. Understanding through content (3a ed.).

Cita Chicago (17th ed.)

Helgesen, Marc, Steven Brown, i Dorolyn Smith. Active Listening. Expanding. Understanding Through Content. 3a ed.

Cita MLA (8th ed.)

Helgesen, Marc, et al. Active Listening. Expanding. Understanding Through Content. 3a ed.