1. Badaracco, J. 2002. Leading quietly. Boston: Harvard Business School Press.
2. Belasco, J., and J. Stead. 1999. The five jobs of leaders. Leader to Leader 14: 15-17.
3. Bellow, S. 2000. Ravelstein. New York: Penguin Putnam.
4. Bennis, W., and B. Nanus. 1997. Leaders: Strategies for taking charge. 2nd ed. New York: Harper Business.
5. Bennis, W., and R. Thomas. 2002. Geeks and geezers: How era, values, and defining moments shape leaders. Boston: Harvard Business School Press.