Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (8a ed.)

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