Catholic Church. Pontificia Commissio de Spirituali Migratorum atque Itinerantium Cura & United States Catholic Conference. (1978). Letter to episcopal conferences on the Church and people on the move: May 4, 1978. United States Catholic Conference.
Παραπομπή σε μορφή Chicago (17η εκδ.)Catholic Church. Pontificia Commissio de Spirituali Migratorum atque Itinerantium Cura και United States Catholic Conference. Letter to Episcopal Conferences on the Church and People on the Move: May 4, 1978. Washington: United States Catholic Conference, 1978.
Παραπομπή σε μορφή MLA (8th εκδ.)Catholic Church. Pontificia Commissio de Spirituali Migratorum atque Itinerantium Cura και United States Catholic Conference. Letter to Episcopal Conferences on the Church and People on the Move: May 4, 1978. United States Catholic Conference, 1978.