Leo XIII. (1998). Encyclical letter: Libertas Praestantissimum of the Supreme Pontiff Pope Leo XIII on human liberty, June 20, 1888 (Angelus Press Edition, February 1998.). Angelus Press.
Chicago Style (17th ed.) CitationLeo XIII. Encyclical Letter: Libertas Praestantissimum of the Supreme Pontiff Pope Leo XIII on Human Liberty, June 20, 1888. Angelus Press Edition, February 1998. Kansas City: Angelus Press, 1998.
MLA (9th ed.) CitationLeo XIII. Encyclical Letter: Libertas Praestantissimum of the Supreme Pontiff Pope Leo XIII on Human Liberty, June 20, 1888. Angelus Press Edition, February 1998. Angelus Press, 1998.
Warning: These citations may not always be 100% accurate.