APA (7th ed.) Zitazioa
Johnson, D. W. (1978). The care and feeding of volunteers. Abingdon.
Chicago Style (17th ed.) Zitazioa
Johnson, Douglas W. The Care and Feeding of Volunteers. Nashville: Abingdon, 1978.
MLA (9th ed.) Zitazioa
Johnson, Douglas W. The Care and Feeding of Volunteers. Abingdon, 1978.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.