Cita APA

Petr, C. G., & Katch, M. The Worker-Client Relationship: A General Systems Perspective. Milwaukee, Wisconsin US: Family Service America.

Citación estilo Chicago

Petr, Christopher G., y Michael Katch. The Worker-Client Relationship: A General Systems Perspective. Milwaukee, Wisconsin US: Family Service America.

Cita MLA

Petr, Christopher G., y Michael Katch. The Worker-Client Relationship: A General Systems Perspective. Milwaukee, Wisconsin US: Family Service America.