"Verliesregister 1939-1945" [Register of airplane losses 1939-1945] (PDF). Ministerie van Defensie (in Dutch). p. 77 line T2553. Retrieved 28 October 2016.
delpher.nl
"Gedenkteken voor Engelse piloten" [Memorial for English pilots]. Nieuwe Apeldoornse courant (in Dutch). 18 September 1950. Retrieved 28 October 2016.
gelderlander.nl
"Oorlog achtervolgde Williams" [How the War chased Williams]. De Gelderlander (web) (in Dutch). 7 May 2009. Retrieved 28 October 2016.