Steven Jobs
Gareth Morgan
Mark H. McCormack
Michael D. Watkins
James M. Kouzes
Chris Bailey
Daniel Goleman
Jim Collins
Thomas Riggs
Michael Lewis
William Thorndike
Scott Adams
United States. General Accounting Office
Robert K. Cooper
Eric Schmidt
Doris Kearns Goodwin
Marcus Buckingham
Edwin C. Bliss
Arthur G. Bedeian