APA (7th ed.) Citation

Catholic Church. Pope (1958-1963 : John XXIII), Campion, D. R., & Culhane, E. K. (1961). Mater et magistra: Christianity and social progress ; an encyclical letter of Pope John XXIII. The America Press.

Chicago Style (17th ed.) Citation

Catholic Church. Pope (1958-1963 : John XXIII), Donald R. Campion, and Eugene K. Culhane. Mater Et Magistra: Christianity and Social Progress ; an Encyclical Letter of Pope John XXIII. New York: The America Press, 1961.

MLA (8th ed.) Citation

Catholic Church. Pope (1958-1963 : John XXIII), et al. Mater Et Magistra: Christianity and Social Progress ; an Encyclical Letter of Pope John XXIII. The America Press, 1961.