O'Malley, W. J. (1976). A book about praying. Paulist Press.
Cita Chicago Style (17a ed.)O'Malley, William J. A Book About Praying. New York: Paulist Press, 1976.
Cita MLA (8a ed.)O'Malley, William J. A Book About Praying. Paulist Press, 1976.
Precaución: Estas citas no son 100% exactas.