Dyfyniad APA
Yalom, I. D. (1975). The theory and practice of group psychotheraphy (2nd ed.). Basic books, Inc.
Dyfyniad Arddull Chicago
Yalom, Irvin D. The Theory and Practice of Group Psychotheraphy. 2nd ed. New York: Basic books, Inc, 1975.
Dyfyniad MLA
Yalom, Irvin D. The Theory and Practice of Group Psychotheraphy. 2nd ed. Basic books, Inc, 1975.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.