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.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPius 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.
एमएलए (8वां संस्करण) प्रशस्ति पत्रPius 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.