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