Johnson, D. W. (1991). Empowering lay volunteers. Abingdon.
Lua i Stíl Chicago (17ú heag.)Johnson, Douglas W. Empowering Lay Volunteers. Nashville: Abingdon, 1991.
Lua MLA (9ú heag.)Johnson, Douglas W. Empowering Lay Volunteers. Abingdon, 1991.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.