Hansen, C. S. (1987). More group retreats. Thom Schultz.
Tohutoru Kātū Chicago (17th ed.)Hansen, Cindy S. More Group Retreats. Loveland: Thom Schultz, 1987.
Tohutoro MLA (9th ed.)Hansen, Cindy S. More Group Retreats. Thom Schultz, 1987.
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