Gaya APA

XXIII, J. (1961). Mater et Magistra: Christianity and social progress, an encyclical letter. Translated by William J. Gibbons, assisted by a committee of Catholic scholars. . New York: New York Paulist Press.

Gaya MLA

XXIII, Joannes. "Mater et Magistra: Christianity and social progress, an encyclical letter. Translated by William J. Gibbons, assisted by a committee of Catholic scholars. ". New York: New York Paulist Press, 1961. Buku.