Pius, P. C. C. P. G. C. T. (1944). Love undying: A simplified edition of the encyclical Casti Connubii, on Christian marriage, by Pope Pius XI. New York.
Chicago Style (17th ed.) CitationPius, Pope; Catholic Church. Pope; Gerald C Treacy. Love Undying: A Simplified Edition of the Encyclical Casti Connubii, on Christian Marriage, by Pope Pius XI. New York, 1944.
MLA (8th ed.) CitationPius, Pope; Catholic Church. Pope; Gerald C Treacy. Love Undying: A Simplified Edition of the Encyclical Casti Connubii, on Christian Marriage, by Pope Pius XI. New York, 1944.
Warning: These citations may not always be 100% accurate.