John XXIII, P. (1959). The Holy Father speaks to teachers. National Catholic Welfare Conference.
Chicago-referens (17:e uppl.)John XXIII, Pope. The Holy Father Speaks to Teachers. Washington, D.C.: National Catholic Welfare Conference, 1959.
MLA-referens (8:e uppl.)John XXIII, Pope. The Holy Father Speaks to Teachers. National Catholic Welfare Conference, 1959.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.