APA (7th ed.) Zitazioa

Johnson, D. W. (1991). Empowering lay volunteers. Abingdon.

Chicago Style (17th ed.) Zitazioa

Johnson, Douglas W. Empowering Lay Volunteers. Nashville: Abingdon, 1991.

MLA (9th ed.) Zitazioa

Johnson, Douglas W. Empowering Lay Volunteers. Abingdon, 1991.