Selk, Jason
Executive toughness : the mental-training program to increase your leadership performance
McGraw-Hill, 2012
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Bellows, Roger
Executive skills : their dynamics, and development
Prentice-Hall, 1962
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Underhill, Brian O.
Executive coaching for results : the definitive guide to developing organizational leaders
Berrett-Koehler Publishers, Inc., 2007
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Vance, Charles C.
Manager today, executive tomorrow
McGraw-Hill, 1974
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Bender, James F.
The technique of executive leadership
McGraw-Hill, 1950
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