Cullmann, O. Early Christian Worship.
Lua i Stíl Chicago (17ú heag.)Cullmann, Oscar. Early Christian Worship. London : SCM Press.
Lua MLA (8ú heag.)Cullmann, Oscar. Early Christian Worship.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.