Cita APA (7a ed.)

Corey, M. S., & Corey, G. (1993). Becoming a helper (2nd ed.). Brooks/Cole Pub. Co..

Cita Chicago Style (17a ed.)

Corey, Marianne Schneider, y Gerald Corey. Becoming a Helper. 2nd ed. Pacific Grove, Calif.: Brooks/Cole Pub. Co., 1993.

Cita MLA (8a ed.)

Corey, Marianne Schneider, y Gerald Corey. Becoming a Helper. 2nd ed. Brooks/Cole Pub. Co., 1993.