Catholic Church. National Conference of Catholic Bishops, National Catholic Welfare Council (U.S.), & Gibbons, J. (1920). Pastoral letter of the archbishops and bishops of the United States assembled in conference at the Catholic University of America, September, 1919. National Catholic welfare council.
Παραπομπή σε μορφή Chicago (17η εκδ.)Catholic Church. National Conference of Catholic Bishops, National Catholic Welfare Council (U.S.), και James Gibbons. Pastoral Letter of the Archbishops and Bishops of the United States Assembled in Conference at the Catholic University of America, September, 1919. Washington, D.C.: National Catholic welfare council, 1920.
Παραπομπή σε μορφή MLA (8th εκδ.)Catholic Church. National Conference of Catholic Bishops, et al. Pastoral Letter of the Archbishops and Bishops of the United States Assembled in Conference at the Catholic University of America, September, 1919. National Catholic welfare council, 1920.