John XXIII, P. (1965). Encyclicals of Pope John XXIII. National Catholic Welfare Conference.
Style de citation Chicago (17e éd.)John XXIII, Pope. Encyclicals of Pope John XXIII. Washington: National Catholic Welfare Conference, 1965.
Style de citation MLA (8e éd.)John XXIII, Pope. Encyclicals of Pope John XXIII. National Catholic Welfare Conference, 1965.
Attention : ces citations peuvent ne pas être correctes à 100%.