By Michael R. Bloomberg, Matthew Winkler
By Russill
By Alexander R. Margulis (Cornell University, New York, NY, U.S.A.)
By Tom Cannon
By Dan McCrum
By Vanessa Branson
By Jan Sutton, William Stewart
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By Peter F. Drucker
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 Helen Jackman
By Mark H. McCormack
By Annabel Karmel
By Trevor L Young
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By GEORGE MAHER
By Abraham H. Maslow, Warren Bennis (University of Southern California)
By Frances Hesselbein, James Collins
By Welch, Jack