Cita APA (7a ed.)

Fischer, L. R., & Schaffer, K. B. (1993). Older volunteers: A guide to research and practice. Sage.

Cita Chicago Style (17a ed.)

Fischer, Lucy Rose, y Kay Banister Schaffer. Older Volunteers: A Guide to Research and Practice. Newbury Park: Sage, 1993.

Cita MLA (9a ed.)

Fischer, Lucy Rose, y Kay Banister Schaffer. Older Volunteers: A Guide to Research and Practice. Sage, 1993.