Ackland, V.L.B. (1970) "A comparison of two group counseling models in facilitating verbal interaction among delinquent girls." Unpublished doctoral dissertation, Arizona State University.
2.
Anderson, A.R. (1964) "An experimental evaluation of role-playing in group counseling." Unpublished doctoral dissertation, Brigham Young University.
3.
Bennis, W.G. (1964) "Patterns and viscissitudes in T-group development ," in L. P. Bradfor, J. R. Gibb, and K. D. Benne (eds.) T-Group Therapy and Laboratory Method. New York: John Wiley.
4.
Egan, G. (1970) Encounter: Group Processes for Interpersonal Growth . Belmont, CA: Wadsworth.
5.
Gibb, J.R. and L.M. Gibb (1969) "Role freedom in a TORI group," in A. Burton (ed.) Encounter: The Theory and Practice of Encounter Groups. San Francisco: Jossey-Bass.
6.
Gutzmer, W.E. (1969) "A study in structured discussion." Unpublished doctoral dissertation, University of Utah.
7.
Hill, W.F. (1971) "The Hill Interaction Matrix." Personnel and Guidance J.49: 619-622.
8.
--- ( 1965) Hill Interaction Matrix Monograph-Revised. Los Angeles: University of Southern California Youth Studies Center.
9.
--- F.H. Stoller, and C.I. Straub (1967) "Group therapy for social impact." Amer. Behavioral Scientist11.
10.
Lewis, J. and P.A. Mider (1973) "Effects of leadership style on content and work styles of short-term therapy groups." J. of Counseling Psychology20: 137-141.
11.
Lindquist, E.F. (1953) Design and Analysis of Experiments in Psychology and Education. Boston: Houghton Mifflin.
Mullen, J. and N. Abeles (1971) "Relationship of liking, empathy and therapist's experience to outcome of therapy." J. of Counseling Psychology18: 39-43.
14.
Rogers, C.R. (1970) Carl Rogers on Encounter Groups. New York: Harper & Row.
15.
Truax, C.B. (1968) "Therapist interpersonal reinforcement of client self-exploration and therapeutic outcome in group psychotherapy." J. of Counseling Psychology15: 225-231.
16.
--- and R.R. Carkhuff (1967) Toward Effective Counseling and Psychotherapy: Training and Practice. Chicago: Aldine.
17.
Williams, J.D. (1970) "A regression approach to experimental design." J. of Exper. Education39: 83-90.
18.
Workentin, J. (1969) "Intensity in group encounter," in A. Burton (ed.) Encounter: The Theory and Practice of Encounter Groups. San Francisco: Jossey-Bass.