References
Adler, a. (1946). Understanding human nature. New York: Permabooks.
Ashour, a.S. (1973). The Contingency Model of Leadership Effectiveness: An Evaluation. Organizational Behavior and Human Decision Processes 9: 335-76.
Bandura, a. (1997). Self-efficacy. The Exercise of Control. New York: W.H. Freeman. (Bass, B.M. 1985). Leadership and Performance Beyond Expectations. New York: The Free Press.
Bennis, W., and B. Nanus. (1985). Leaders. New York: Harper and Row.