By Carol Sanford
By Sir Lawrence Freedman
By Nora Gallagher, Lisa Myers, Yvon Chouinard
By Mike Brent, Fiona Dent
By Helen Tupper, Sarah Ellis
By Nigel Vaz
By David Hurst, OSB
By Neil Rackham, Terry Morgan
By Stafford Beer
By Mel Berger
By Carol A. O'Connor
By Pamela Meyer
By John P. Kotter
By Max Mckeown
By Gary Yukl
By Daniel Coyle
By Templar, Richard
By Alan Chambers, Richard Hale
By Frances Hesselbein, James Collins
By Welch, Jack
By Donald Sull
By David Rock (Sydney, Australia), Linda J. Page (PhD, Adler International Learning, Toronto, Canada)
By Cynthia D. McCauley, Ellen Van Velsor
By Christian Harrison
By Peter Hawkins
By Diane Elizabeth Dreher
By Alan Hooper, John Potter
By Colin Turner
By Martin Wilcox (Center for Creative Leadership), Stephen Rush (Center for Creative Leadership)
By James M. Kouzes (Emeritus, Tom Peters Company), Barry Z. Posner (Leavey School of Business and Administration and Santa Clara University)