ISBN 0-14-100975-6. ↑ Kershaw, Ian (2000) Hitler, 1889-1936: Hubris, W. W. Norton & Company. pp.138-139. ISBN 9780393320350 ↑ Goodrick-Clarke 1985, pp. 149, 221 ↑ Goodrick-Clarke 2003, p. 114 ↑ Cecil, p.34 ↑ Kellogg 227–228 ↑ Cecil, pp.42–3 ↑ Goldensohn, Leon; Gellately, Robert (ed) (2004).