O'Hara, E. V. (1955). The lay apostolate: According to the mind of Pope Pius X. Confraternity Publications.
Chicago-referens (17:e uppl.)O'Hara, Edwin V. The Lay Apostolate: According to the Mind of Pope Pius X. Paterson, N.J.: Confraternity Publications, 1955.
MLA-referens (8:e uppl.)O'Hara, Edwin V. The Lay Apostolate: According to the Mind of Pope Pius X. Confraternity Publications, 1955.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.