APA (7e ed.) Bronvermelding

John XXIII, P. (1965). Encyclicals of Pope John XXIII. National Catholic Welfare Conference.

Chicago (17e ed.) Bronvermelding

John XXIII, Pope. Encyclicals of Pope John XXIII. Washington: National Catholic Welfare Conference, 1965.

MLA (8e ed.) Bronvermelding

John XXIII, Pope. Encyclicals of Pope John XXIII. National Catholic Welfare Conference, 1965.

Let op: Deze citaties zijn niet altijd 100% accuraat.