Kelly, W. (1976). Pope Gregory II on divorce and remarriage. Univ. Gregoria.
Cita Chicago Style (17a ed.)Kelly, Williams. Pope Gregory II on Divorce and Remarriage. Roma: Univ. Gregoria, 1976.
Cita MLA (9a ed.)Kelly, Williams. Pope Gregory II on Divorce and Remarriage. Univ. Gregoria, 1976.
Precaución: Estas citas no son 100% exactas.