APA (7. basım) Alıntı

Pius XI, P. (1931). After forty years: Encyclical letter of His Holiness Pius XI ... In commemoration of the fortieth anniversary of the encyclical "Rerum novarum" (T he new conditions). Barry Vail Corp..

Chicago Style (17. basım) Atıf

Pius XI, Pope. After Forty Years: Encyclical Letter of His Holiness Pius XI ... In Commemoration of the Fortieth Anniversary of the Encyclical "Rerum Novarum" (T He New Conditions). N.Y.: Barry Vail Corp., 1931.

MLA (8th ed.) Atıf

Pius XI, Pope. After Forty Years: Encyclical Letter of His Holiness Pius XI ... In Commemoration of the Fortieth Anniversary of the Encyclical "Rerum Novarum" (T He New Conditions). Barry Vail Corp., 1931.