APA (7e ed.) Bronvermelding

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.

Chicago (17e ed.) Bronvermelding

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.

MLA (8e ed.) Bronvermelding

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.