Regan. The American Constitution and Religion. The Catholic University of America Press.
Chicago-viite (17. p.)Regan. The American Constitution and Religion. The Catholic University of America Press.
MLA-viite (9. p.)Regan. The American Constitution and Religion. The Catholic University of America Press.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.