Built to Last, James C. Collins, Jerry I. Porras, New York: Harper Business, 1994

Fourth Generation Management, The New Business Consciousness, Brian Joiner, McGraw-Hill, New York, 1994

Scuttle Your Ships Before Advancing, Richard Luecke, Oxford University Press, NY, 1994

Partners in Command, Joseph T. Glatthaar, Free Press, 1994

Sun-Tzu, The Art of War, a new translation by Ralph D. Sawyer, Barnes and Noble, Inc., 1994

The Genius of Sitting Bull, E. C. Murphy, Prentice Hall, Englewood Cliffs, NJ, 1993

Stewardship, Peter Block, Berrett Koehler Publishers, San Francisco, 1993

The Trust Factor, Liberating Profits and Restoring Corporate Vitality, John Whitney, McGraw-Hill, 1993

Leadership and the New Science, Margaret Wheatley, Berrett Koehler Publishers, San Francisco, 1992

Managing for the Future, Peter F. Drucker, Dutton, New York, 1992

Leadership, The Inner Side of Greatness, Peter Kostenbaum, Jossey-Bass 1991

Leadership is an Art, Max Depree, Dell Publishing Company, New York, 1989

The Effective Executive, Peter Drucker, Harper Collins Publishers, Inc. New York, 1966