Tham khảo Speedbird

  1. ↑ Heraldry of Air Transport (1), BOAC's Speedbird, one of the classics of airline and advertising design 
  2. ↑ Poetics of the Poster, 2010, ISBN 9781846314865 
  3. ↑ Glenn H Morgan; Theyre Lee-Elliott (1903-1988): Graphic Designer, Artist and Writer (retrieved 11 September 2015)
  4. ↑ Norris, G.; The Short Empire Flying Boats, Profile Publications, 1966.