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.
Chicago (17e ed.) BronvermeldingCatholic Church. Pontificia Commissio de Spirituali Migratorum atque Itinerantium Cura en 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.
MLA (8e ed.) BronvermeldingCatholic Church. Pontificia Commissio de Spirituali Migratorum atque Itinerantium Cura en United States Catholic Conference. Letter to Episcopal Conferences on the Church and People on the Move: May 4, 1978. United States Catholic Conference, 1978.