Vaughan, J. Is there salvation outside the Church? International Catholic Truth Society.
Chicago-referens (17:e uppl.)Vaughan, John. Is There Salvation Outside the Church? Brooklyn, N.Y.: International Catholic Truth Society.
MLA-referens (8:e uppl.)Vaughan, John. Is There Salvation Outside the Church? International Catholic Truth Society.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.