BennisW., and ShepardH.“A Theory of Group Development” in BennisW., BenneK., and ChinR.The Planning of Change.New York: Holt, Rinehart and Winston, 1962.
2.
GibbJack R.“The counselor as a Role-Free Person”in ParkerC. A. (ed.) Counseling Theories and Counselor Education.Boston: Houghton Mifflin, 1968, pp. 19–45.
3.
MilesMatthewLearning to Work in Groups.New York. Bureau of Publications, Teachers College, Columbia University, 1959.
4.
SchutzWilliamJoy: Expanding Human Awareness.New York: Grove Press, 1967.