Corey, G., Callanan, P., Corey, C., & Corey, M. S. (2015). Issues and ethics in the helping professions (Ninth edition.). Brooks/Cole/Cengage Learning.
Chicago-viite (17. p.)Corey, Gerald, Patrick Callanan, Cindy Corey, ja Marianne Schneider Corey. Issues and Ethics in the Helping Professions. Ninth edition. Australia: Brooks/Cole/Cengage Learning, 2015.
MLA-viite (9. p.)Corey, Gerald, et al. Issues and Ethics in the Helping Professions. Ninth edition. Brooks/Cole/Cengage Learning, 2015.
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