McKenna, C. (1998). Powerful communication skills: How to communicate with confidence. Career Press.
Chicago-Zitierstil (17. Ausg.)McKenna, Colleen. Powerful Communication Skills: How to Communicate with Confidence. Franklin Lakes, N.J: Career Press, 1998.
MLA-Zitierstil (9. Ausg.)McKenna, Colleen. Powerful Communication Skills: How to Communicate with Confidence. Career Press, 1998.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.