John XXIII, P. (1961). The Holy Father speaks to athletes. National Catholic Welfare Conference.
Chicago (17e ed.) BronvermeldingJohn XXIII, Pope. The Holy Father Speaks to Athletes. Washington: National Catholic Welfare Conference, 1961.
MLA (8e ed.) BronvermeldingJohn XXIII, Pope. The Holy Father Speaks to Athletes. National Catholic Welfare Conference, 1961.
Let op: Deze citaties zijn niet altijd 100% accuraat.