Cita APA (7a ed.)

Lauffer, A., & Gorodezky, S. (1977). Volunteers. Sage human services guides.

Cita Chicago Style (17a ed.)

Lauffer, Armand, y Sarah Gorodezky. "Volunteers." Sage Human Services Guides 1977.

Cita MLA (9a ed.)

Lauffer, Armand, y Sarah Gorodezky. "Volunteers." Sage Human Services Guides, 1977.