Sheen, F. J. (1952). The crisis in Christendom. National Council of Catholic Men.
Lua i Stíl Chicago (17ú heag.)Sheen, Fulton J. The Crisis in Christendom. Washington, D.C.: National Council of Catholic Men, 1952.
Lua MLA (8ú heag.)Sheen, Fulton J. The Crisis in Christendom. National Council of Catholic Men, 1952.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.