Catholic Church. Pope (1878-1903 : Leo XIII) & Leo XIII, P. (1998). Encyclical letter Libertas praestantissimum of the supreme Pontiff Leo XIII: On human liberty, June 20, 1888. Angelus Press.
Chicago-Zitierstil (17. Ausg.)Catholic Church. Pope (1878-1903 : Leo XIII) und Pope Leo XIII. Encyclical Letter Libertas Praestantissimum of the Supreme Pontiff Leo XIII: On Human Liberty, June 20, 1888. Kansas City, Mo.: Angelus Press, 1998.
MLA-Zitierstil (8. Ausg.)Catholic Church. Pope (1878-1903 : Leo XIII) und Pope Leo XIII. Encyclical Letter Libertas Praestantissimum of the Supreme Pontiff Leo XIII: On Human Liberty, June 20, 1888. Angelus Press, 1998.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.