Helgesen, M., & Brown, S. (1994). Active listening: Building skills for understanding : Level 2 [Băng Casset]. Cambridge: Cambridge University Press.
Παραπομπή Chicago StyleHelgesen, Marc, και Steven Brown. Active Listening: Building Skills for Understanding : Level 2 [Băng Casset]. Cambridge: Cambridge University Press, 1994.
Παραπομπή MLAHelgesen, Marc, και Steven Brown. Active Listening: Building Skills for Understanding : Level 2 [Băng Casset]. Cambridge: Cambridge University Press, 1994.
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