Catholic Church. Pope (1922-1939 : Pius XI), Catholic Church. Pope (1878-1903 : Leo XIII), & National Catholic Welfare Conference. (1940). Encyclical letter of His Holiness Pius XI, by Divine providence, pope ... on reconstructing the social order and perfecting it conformably to the precepts of the gospel, in commemoration of the fortieth anniversary of the encyclical "Rerum novarum." (10th printing.). National Catholic Welfare Conference.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Catholic Church. Pope (1922-1939 : Pius XI), Catholic Church. Pope (1878-1903 : Leo XIII), و National Catholic Welfare Conference. Encyclical Letter of His Holiness Pius XI, by Divine Providence, Pope ... on Reconstructing the Social Order and Perfecting It Conformably to the Precepts of the Gospel, in Commemoration of the Fortieth Anniversary of the Encyclical "Rerum Novarum.". 10th printing. Washington, D.C.: National Catholic Welfare Conference, 1940.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Catholic Church. Pope (1922-1939 : Pius XI), et al. Encyclical Letter of His Holiness Pius XI, by Divine Providence, Pope ... on Reconstructing the Social Order and Perfecting It Conformably to the Precepts of the Gospel, in Commemoration of the Fortieth Anniversary of the Encyclical "Rerum Novarum.". 10th printing. National Catholic Welfare Conference, 1940.