Marc Helgesen. (1994). Active listening building: Building skills for understanding. Cambridge, UK: Cambridge university press.
Παραπομπή Chicago StyleMarc Helgesen. Active Listening Building: Building Skills for Understanding. Cambridge, UK: Cambridge university press, 1994.
Παραπομπή MLAMarc Helgesen. Active Listening Building: Building Skills for Understanding. Cambridge, UK: Cambridge university press, 1994.
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