↑"Great Activity at Sandringham". Aberdeen Journal. British Newspaper Archive. 24 December 1936. Gikuha niadtong 9 September 2016 – pinaagi sa British Newspaper Archive. Unknown parameter |subscription= ignored (|url-access= suggested) (help)
↑Bewes, Diccon (2013). Slow Train to Switzerland. Nicholas Brealey Publishing. ISBN9781857889765.