By Abraham H. Maslow, Warren Bennis (University of Southern California)
By Steve Sanders
By Frances Hesselbein, James Collins
By Welch, Jack
By Sallie Sherman, Joseph Sperry, Samuel Reese
By Mark H. McCormack
By Vanessa Branson
By Tom Bower
By Jan Sutton, William Stewart
By Tom Peters
By Martin Wilcox (Center for Creative Leadership), Stephen Rush (Center for Creative Leadership)
By Colin Turner
By James Watt
By Sahar Hashemi, Bobby Hashemi
By Michael E. Gerber
By Matthew Dixon, Brent Adamson, Pat Spenner, Nick Toman
By Joe Vitale (Hypnotic Marketing, Inc., Wimberley, TX)
By S. Kaplan
By Andrew Payne, etc., John Chelsom, Lawrie Reavill
By Jeetendr Sehdev
By Helen Jackman
By Robert E. Quinn
By Emma Jones
By BJ Gallagher, Warren H. Schmidt
By Allen Fox
By Stutely, Sir Richard
By Subir Chowdhury
By Peter J. Frost
By George Eckes
By Annabel Karmel