Cita APA

Corey, M. S. 1., & Corey, G. (2007). Becoming a helper (5th ed.). Belmont, CA: Thomson Higher Education.

Chicago Style Citation

Corey, Marianne Schneider 1942-, i Gerald Corey. Becoming a Helper. 5th ed. Belmont, CA: Thomson Higher Education, 2007.

Cita MLA

Corey, Marianne Schneider 1942-, i Gerald Corey. Becoming a Helper. 5th ed. Belmont, CA: Thomson Higher Education, 2007.