Corey, G., Corey, M. S., & Corey, C. (2019). Issues & ethics in the helping professions (10e.). Cengage Learning.
Lua i Stíl Chicago (17ú heag.)Corey, Gerald, Marianne Schneider Corey, agus Cindy Corey. Issues & Ethics in the Helping Professions. 10e. Boston, MA, USA: Cengage Learning, 2019.
Lua MLA (9ú heag.)Corey, Gerald, et al. Issues & Ethics in the Helping Professions. 10e. Cengage Learning, 2019.
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