Cita APA (7a ed.)

Corey, M. S., & Corey, G. (1988). Becoming a helper. Brooks/Cole.

Cita Chicago Style (17a ed.)

Corey, Marianne Schneider, y Gerald Corey. Becoming a Helper. California: Brooks/Cole, 1988.

Cita MLA (9a ed.)

Corey, Marianne Schneider, y Gerald Corey. Becoming a Helper. Brooks/Cole, 1988.