Pius XI, P. (1954). Encyclical letter (Quadragesimo anno) of His Holiness Pope Pius XI, on reconstructing the social order and perfecting it conformably to the precepts of the gospel, in commemoration of the fortieth anniversary of the enclyclical "Rerum novarum.". Oxford.
Trích dẫn kiểu Chicago (xuất bản lần thứ 7)Pius XI, Pope. Encyclical Letter (Quadragesimo Anno) of His Holiness Pope Pius XI, on Reconstructing the Social Order and Perfecting It Conformably to the Precepts of the Gospel, in Commemoration of the Fortieth Anniversary of the Enclyclical "Rerum Novarum.". Oxford, 1954.
Trích dẫn kiểu MLA (xuất bản lần thứ 8)Pius XI, Pope. Encyclical Letter (Quadragesimo Anno) of His Holiness Pope Pius XI, on Reconstructing the Social Order and Perfecting It Conformably to the Precepts of the Gospel, in Commemoration of the Fortieth Anniversary of the Enclyclical "Rerum Novarum.". Oxford, 1954.