Cita APA (7a ed.)

Joan XXIII, p., & Campion, D. R. C. (1961). Mater et Magistra: Christianity and Social Progress. The American Press.

Cita Chicago Style (17a ed.)

Joan XXIII, papa, y Donald R.; Culhane Campion. Mater Et Magistra: Christianity and Social Progress. New York: The American Press, 1961.

Cita MLA (9a ed.)

Joan XXIII, papa, y Donald R.; Culhane Campion. Mater Et Magistra: Christianity and Social Progress. The American Press, 1961.