1. Greenleaf R. K. (1977). Servant leadership . Paulist Press Ramsey N.J.
2. Hensey M. (1992). Collective excellence: Building effective teams . ASCE New York N.Y.
3. Lewin K. (1951). Field theory in social science . Harper New York N.Y.
4. Rees F. (1991). How to lead work teams: Facilitation skills . Pfeiffer & Co. San Diego Calif.
5. Scholtes P. R. (1988). The team handbook: How to use teams to improve quality . Joiner Assoc. Inc. Madison Wis.