1
by Hebert, Tim
Published 2022
Ascent Audio

2
by Brafman, Ori
Published 2008
HighBridge Co.

3
by Albrecht, Karl
Published 2007
Jossey-Bass

4
by Smith, Jim
Published 2008
ASTD Press

5
by Peterson, Kay, Kolb, David A.
Published 2017
Berrett-Koehler Publishers