Leo XIII, P. C. C. P. (1884). On the Sect of Free Masons, Encyclical Letter of Our Holy Father by Divine Providence Pope Leo the Thirteenth. Philadelphia.
Lua i Stíl Chicago (17ú heag.)Leo XIII, Pope; Catholic Church. Pope. On the Sect of Free Masons, Encyclical Letter of Our Holy Father by Divine Providence Pope Leo the Thirteenth. Philadelphia, 1884.
Lua MLA (8ú heag.)Leo XIII, Pope; Catholic Church. Pope. On the Sect of Free Masons, Encyclical Letter of Our Holy Father by Divine Providence Pope Leo the Thirteenth. Philadelphia, 1884.
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