John XXIII, P. (1961). The Holy Father speaks to athletes. National Catholic Welfare Conference.
Chicago-referens (17:e uppl.)John XXIII, Pope. The Holy Father Speaks to Athletes. Washington: National Catholic Welfare Conference, 1961.
MLA-referens (8:e uppl.)John XXIII, Pope. The Holy Father Speaks to Athletes. National Catholic Welfare Conference, 1961.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.