Leo XIII, P. C. C. P. (1894). Litterae Encyclicae. Staten Island, N.Y..
Chicago Style (17th ed.) CitationLeo XIII, Pope; Catholic Church. Pope. Litterae Encyclicae. Staten Island, N.Y., 1894.
Cita MLALeo XIII, Pope; Catholic Church. Pope. Litterae Encyclicae. Staten Island, N.Y., 1894.
Atenció: Aquestes cites poden no estar 100% correctes.