Παραπομπή σε μορφή APA (7η εκδ.)

Schmidt, T. V. (1981). A guide to the encyclicals of the Roman pontiffs from Pius XII to Paul VI (1939-1978). Catholic University of America.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Schmidt, Thomas V. A Guide to the Encyclicals of the Roman Pontiffs from Pius XII to Paul VI (1939-1978). Washington, D.C.: Catholic University of America, 1981.

Παραπομπή σε μορφή MLA (8th εκδ.)

Schmidt, Thomas V. A Guide to the Encyclicals of the Roman Pontiffs from Pius XII to Paul VI (1939-1978). Catholic University of America, 1981.