Redigerer Airspeed AS.6 Envoy (avsnitt)

==Litteratur==
* Hamlin, John. ''The Oxford, Consul & Envoy File''. Air-Britain Ltd, 2001, {{ISBN|0 85130 2890}}
* Howson, Gerald. "Contraband Wings of the Spanish Civil War...Britain's Clandestine Contribution". tidsskrift ''Air Enthusiast 10,'' July–September 1979, pp.&nbsp;68–78.
* Jackson, A. J. ''British Civil Aircraft since 1919: Volume 1 (2nd ed.)''. London: Putnam, 1973. {{ISBN|0-370-10006-9}}.
* Ketley, Barry and Mark Rolfe. ''Luftwaffe Fledglings 1935-1945: Luftwaffe Training Units and their Aircraft.'' Aldershot, UK: Hikoki Publications, 1996. {{ISBN|978-0-9519899-2-0}}.
* Shores, Christopher F. et al. ''Above the Trenches: A Complete Record of the Fighter Aces and Units of the British Empire Air Forces 1915-1920.'' London: Grub Street, 1990. {{ISBN|978-0-948817-19-9}}.
* Taylor, H. A. ''Airspeed Aircraft since 1931.'' London: Putnam Publishing, 1970, pp.&nbsp;69–70. {{ISBN|0-370-00110-9}}.