Bock, E. C. (1977). Wilhelm von Ketteler, Bishop of Mainz: His life, times and ideas. University Press of America.
Chicago (17e ed.) BronvermeldingBock, Edward C. Wilhelm Von Ketteler, Bishop of Mainz: His Life, Times and Ideas. Washington, D.C.: University Press of America, 1977.
MLA (8e ed.) BronvermeldingBock, Edward C. Wilhelm Von Ketteler, Bishop of Mainz: His Life, Times and Ideas. University Press of America, 1977.
Let op: Deze citaties zijn niet altijd 100% accuraat.