Paul VI, P. (1965). On vocations. National Catholic Welfare Conference.
Lua i Stíl Chicago (17ú heag.)Paul VI, Pope. On Vocations. Washington, D.C.: National Catholic Welfare Conference, 1965.
Lua MLA (8ú heag.)Paul VI, Pope. On Vocations. National Catholic Welfare Conference, 1965.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.