Cita APA (7a ed.)

Catholic Church. Pope (1878-1903 : Leo XIII) & Treacy, G. C. (1941). Christian democracy: Encyclical letter of Pope Leo XIII. Graves de communi. The Paulist Press.

Cita Chicago Style (17a ed.)

Catholic Church. Pope (1878-1903 : Leo XIII) y Gerald C. Treacy. Christian Democracy: Encyclical Letter of Pope Leo XIII. Graves De Communi. New York: The Paulist Press, 1941.

Cita MLA (8a ed.)

Catholic Church. Pope (1878-1903 : Leo XIII) y Gerald C. Treacy. Christian Democracy: Encyclical Letter of Pope Leo XIII. Graves De Communi. The Paulist Press, 1941.