Assassination attempts on Adolf Hitler (English Wikipedia)

Germany, SPIEGEL ONLINE, Hamburg (27 February 2011). "SPIEGEL-GESPRÄCH: "Angst halte ich für sehr vernünftig" – DER SPIEGEL 9/2011". Der Spiegel. Archived from the original on 10 October 2016. Retrieved 13 July 2017.{{cite news}}: CS1 maint: multiple names: authors list (link)

web.archive.org (Global: 1^st place; English: 1^st place)

"Attentats contre Hitler". resistanceallemande.online.fr. Archived from the original on 2023-12-02. Retrieved 2023-12-02.
Greenaway, Heather (17/01/2016); "New book reveals Scottish soldier's extraordinary plan to assassinate Hitler on his 50th birthday Archived 2023-02-16 at the Wayback Machine"; Daily Record; Retrieved 01/02/2019
"Warszawski zamach na Hitlera: Hitler przemknął im koło nosa" (in Polish). October 5, 2011. Archived from the original on October 10, 2011. Retrieved October 8, 2011.
Germany, SPIEGEL ONLINE, Hamburg (27 February 2011). "SPIEGEL-GESPRÄCH: "Angst halte ich für sehr vernünftig" – DER SPIEGEL 9/2011". Der Spiegel. Archived from the original on 10 October 2016. Retrieved 13 July 2017.{{cite news}}: CS1 maint: multiple names: authors list (link)
Lehrer, Steven (2002). Hitler Sites: A City-by-city Guidebook (Austria, Germany, France, United States). McFarland. p. 224. ISBN 0-7864-1045-0. Archived from the original on 2024-01-25. Retrieved 2023-12-04.
Lehrer, Steven (2006). The Reich Chancellery and Führerbunker Complex: An Illustrated History of the Seat of the Nazi Regime. McFarland. p. 214. ISBN 0-7864-2393-5. Archived from the original on 2024-01-25. Retrieved 2023-12-04.

Butler, Ewan (1972). Mason-Mac: the life of Lieutenant-General Sir Noel Mason-Macfarlane: a biography. London: Macmillan. p. 75. ISBN 0-333-11475-2. OCLC 636940.