Cita APA (7a ed.)

Leo XIII, P. (1880). Encyclical Letter of Pope Leo XIII. on christian Marriage. Philadelphia.

Cita Chicago Style (17a ed.)

Leo XIII, Pope. Encyclical Letter of Pope Leo XIII. on Christian Marriage. Philadelphia, 1880.

Cita MLA (8a ed.)

Leo XIII, Pope. Encyclical Letter of Pope Leo XIII. on Christian Marriage. Philadelphia, 1880.