O'Hara, E. V. (1931). Catholic Evidence Work in the United States: A Survey of Its Status and of Its Prospects. S.I..
Chicago-referens (17:e uppl.)O'Hara, Edwin V. Catholic Evidence Work in the United States: A Survey of Its Status and of Its Prospects. S.I., 1931.
MLA-referens (8:e uppl.)O'Hara, Edwin V. Catholic Evidence Work in the United States: A Survey of Its Status and of Its Prospects. S.I., 1931.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.