Dale Carnegie Training (Firm), & Simon and Schuster, i. (2009). The 5 essential people skills: How to assert yourself, listen to others, and resolve conflicts. New York: Simon & Schuster.

Dale Carnegie Training (Firm), and inc Simon and Schuster. The 5 Essential People Skills: How to Assert Yourself, Listen to Others, and Resolve Conflicts. New York: Simon & Schuster, 2009.

Dale Carnegie Training (Firm), and inc Simon and Schuster. The 5 Essential People Skills: How to Assert Yourself, Listen to Others, and Resolve Conflicts. New York: Simon & Schuster, 2009.