Gaya APA

XI, P. ( tthn). Quadragesimo anno, Reconstructing the social order. transl. with study aids, ed. by Ph.Land S.J. Encyclical letter, 1931. . New York: America Press.

Gaya MLA

XI, Pius. "Quadragesimo anno, Reconstructing the social order. transl. with study aids, ed. by Ph.Land S.J. Encyclical letter, 1931. ". New York: America Press, tthn. Buku.