Catholic Church. Pope (1922-1939 : Pius XI) & Pius XI, P. (1931). On Christian marriage: Complete official text of the recent encyclical letter of Pope Pius XI. America Press.
Citace podle Chicago (17th ed.)Catholic Church. Pope (1922-1939 : Pius XI) a Pope Pius XI. On Christian Marriage: Complete Official Text of the Recent Encyclical Letter of Pope Pius XI. New York: America Press, 1931.
Citace podle MLA (8th ed.)Catholic Church. Pope (1922-1939 : Pius XI) a Pope Pius XI. On Christian Marriage: Complete Official Text of the Recent Encyclical Letter of Pope Pius XI. America Press, 1931.
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