On becoming a servant-leader : the private writings of Robert K. Greenleaf / Robert K. Greenleaf ; Don M.Frick, Larry C. Spears,editors; Foreword by Peter F. Drucker. - Greenleaf, Robert K. (OLS)http://pul/name/59583; Spears, Larry C. (OLS)http://pul/name/59585; Frick, Don M. (OLS)http://pul/name/59584 (Jossey-Bass Publishers, 1996)
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