APA-viite (7. p.)
Hoppe, M. H. (2006). Active listening: Improve your ability to listen and lead. Center for Creative Leadership.
Chicago-viite (17. p.)
Hoppe, Michael H. Active Listening: Improve Your Ability to Listen and Lead. Greensboro, N.C.: Center for Creative Leadership, 2006.
MLA-viite (9. p.)
Hoppe, Michael H. Active Listening: Improve Your Ability to Listen and Lead. Center for Creative Leadership, 2006.
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