Gilbert, J. (1975). The world's worst aircraft. M & J Hobbs in association with Michael Joseph.
Chicago-referens (17:e uppl.)Gilbert, James. The World's Worst Aircraft. Walton-on-Thames [Eng.]: M & J Hobbs in association with Michael Joseph, 1975.
MLA-referens (8:e uppl.)Gilbert, James. The World's Worst Aircraft. M & J Hobbs in association with Michael Joseph, 1975.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.