Corey, M. S., Corey, G., & Corey, C. (2014). Groups: Process and practice (Ninth edition.). Brooks/Cole, Cengage Learning.
Citace podle Chicago (17th ed.)Corey, Marianne Schneider, Gerald Corey, a Cindy Corey. Groups: Process and Practice. Ninth edition. Australia: Brooks/Cole, Cengage Learning, 2014.
Citace podle MLA (9th ed.)Corey, Marianne Schneider, et al. Groups: Process and Practice. Ninth edition. Brooks/Cole, Cengage Learning, 2014.
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