O'Brien, J. A. (1957). Is one religion as good as another?: A plain answer to a common question. Our Sunday Visitor Press.
Chicago-viite (17. p.)O'Brien, John A. Is One Religion as Good as Another?: A Plain Answer to a Common Question. Huntington, Indiana: Our Sunday Visitor Press, 1957.
MLA-viite (8. p.)O'Brien, John A. Is One Religion as Good as Another?: A Plain Answer to a Common Question. Our Sunday Visitor Press, 1957.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.