Παραπομπή σε μορφή APA (7η εκδ.)

John XXIII, P. (1963). On doing penance during Lent. National Catholic Welfare Conference.

Παραπομπή σε μορφή Chicago (17η εκδ.)

John XXIII, Pope. On Doing Penance During Lent. Washington, D.C.: National Catholic Welfare Conference, 1963.

Παραπομπή σε μορφή MLA (8th εκδ.)

John XXIII, Pope. On Doing Penance During Lent. National Catholic Welfare Conference, 1963.