Cita APA (7th ed.)
Johnson, D. W. (1978). The care and feeding of volunteers. Abingdon.
Cita Chicago (17th ed.)
Johnson, Douglas W. The Care and Feeding of Volunteers. Nashville: Abingdon, 1978.
Cita MLA (9th ed.)
Johnson, Douglas W. The Care and Feeding of Volunteers. Abingdon, 1978.
Atenció: Aquestes cites poden no estar 100% correctes.