Παραπομπή σε μορφή APA (7η εκδ.)

Treacy, G. C. L. X. (1941). Christian democracy, encyclical letter of Pope Leo XIII. Graves de communi. With Discussion Club Outline by Rev. Gerald C. Treacy, S.J. New York.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Treacy, Gerald C.; Leo XIII. Christian Democracy, Encyclical Letter of Pope Leo XIII. Graves De Communi. With Discussion Club Outline by Rev. Gerald C. Treacy, S.J. New York, 1941.

Παραπομπή σε μορφή MLA (8th εκδ.)

Treacy, Gerald C.; Leo XIII. Christian Democracy, Encyclical Letter of Pope Leo XIII. Graves De Communi. With Discussion Club Outline by Rev. Gerald C. Treacy, S.J. New York, 1941.