Leo XIII, P. (1880). Encyclical Letter of Pope Leo XIII. on christian Marriage. Philadelphia.
Lua i Stíl Chicago (17ú heag.)Leo XIII, Pope. Encyclical Letter of Pope Leo XIII. on Christian Marriage. Philadelphia, 1880.
Lua MLA (8ú heag.)Leo XIII, Pope. Encyclical Letter of Pope Leo XIII. on Christian Marriage. Philadelphia, 1880.
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