1. Bass & Stogdill’s Handbook of Leadership Theory, Research & Managerial Applications;Bass,1990
2. Leadership and organizational performance: a study of large organisations;Lieberson;American Sociological Review,1972
3. Leadership in Organisations;Yukl,1994
4. What leaders really do;Kotter;Harvard Business Review,1990
5. Mintzberg on Management;Mintzberg,1989