^ 2.02.1"The Mind of Adolf Hitler", Walter C Langer, New York 1972 p. 116
^Payne, Robert. The Life and Death of Adolf Hitler. New York: Praeger. 1973: 12. The marriage took place early in the morning, and Klara is said to have complained: 'We were married at six o'clock in the morning, and my husband was already at work at seven.'
^Vermeeren, Mar, De jeugd van Adolf Hitler 1889–1907 en zijn familie en voorouders, Soesterberg, 2007, Uitgeverij Aspekt, ISBN978-90-5911-606-1 (Note: source carried forward and only presumed reliable)
^"[She] was completely devoted to the faith and teachings of Catholicism..." Smith, p. 42
^ 7.07.1Olson, James S. Bathsheba's Breast: Women, Cancer, and History. JHU Press. 2005-01-05: 94. ISBN 0-801-88064-5.
^ 10.010.1Kershaw, Ian. Hitler: A Biography. W. W. Norton & Company. 2010-01-18: 15. ISBN 0-393-07562-1.
^Owens Zalampas, Sherree. Adolf Hitler: A Psychological Interpretation of His Views on Architecture, Art, and Music 2nd. Popular Press. 1990-01-01: 17. ISBN 0-742-55716-2.
^Bergen, Doris L. War and Genocide: A Concise History of the Holocaust. Rowman & Littlefield Publishers. 2009-02-16: 31. ISBN 0-393-07562-1.
Marc Vermeeren, "De jeugd van Adolf Hitler 1889–1907 en zijn familie en voorouders"; Soesterberg (2007), 420 blz. Uitgeverij Aspekt. ISBN978-90-5911-606-1