Puryear, D. A. (1988). Helping people in crisis. Jossey-Bass.
Cita Chicago Style (17a ed.)Puryear, Douglas A. Helping People in Crisis. San Francisco [etc.]: Jossey-Bass, 1988.
Cita MLA (9a ed.)Puryear, Douglas A. Helping People in Crisis. Jossey-Bass, 1988.
Precaución: Estas citas no son 100% exactas.