O'Callaghan. Children of God in the World. The Catholic University of America Press.
Cita Chicago (17th ed.)O'Callaghan. Children of God in the World. The Catholic University of America Press.
Cita MLA (9th ed.)O'Callaghan. Children of God in the World. The Catholic University of America Press.
Atenció: Aquestes cites poden no estar 100% correctes.