Cita APA (7a ed.)

Corey, G., Corey, M. S., & Callanan, P. (1993). Issues and ethics in the helping professions (4th ed.). Brooks-Cole.

Cita Chicago Style (17a ed.)

Corey, Gerald, Marianne Schneider Corey, y Patrick Callanan. Issues and Ethics in the Helping Professions. 4th ed. Pacific Grove, California: Brooks-Cole, 1993.

Cita MLA (9a ed.)

Corey, Gerald, et al. Issues and Ethics in the Helping Professions. 4th ed. Brooks-Cole, 1993.