APA (7th ed.) Citation

Pridgeon, C., & John XXIII, P. (1963). John XXIII's Mater et magistra in question and answer. Catholic Social Guild.

Chicago Style (17th ed.) Citation

Pridgeon, Charles, and Pope John XXIII. John XXIII's Mater Et Magistra in Question and Answer. Oxford: Catholic Social Guild, 1963.

MLA (8th ed.) Citation

Pridgeon, Charles, and Pope John XXIII. John XXIII's Mater Et Magistra in Question and Answer. Catholic Social Guild, 1963.