Cita APA (7a ed.)

John XXIII, P. (1963). Apostolic constitution convoking the Second Vatican Ecumenical Council. National Catholic Welfare Conference.

Cita Chicago Style (17a ed.)

John XXIII, Pope. Apostolic Constitution Convoking the Second Vatican Ecumenical Council. Washington: National Catholic Welfare Conference, 1963.

Cita MLA (8a ed.)

John XXIII, Pope. Apostolic Constitution Convoking the Second Vatican Ecumenical Council. National Catholic Welfare Conference, 1963.