Tham khảo Beardmore W.B.IV

  1. ↑ Taylor 1990, p.57.
  2. 1 2 Bruce 1965, p.74
  • Bruce, J.M. (1965). War Planes of the First World War: Volume 1 Fighters. London: Macdonald.
  • Mason, Francis K (1992). The British Fighter since 1912. Annapolis, Maryland US: Naval Institute Press. ISBN 1-55750-082-7.
  • Taylor, Michael J. H. (1990). Jane's Fighting Aircraft of World War I. London: Studio Editions. tr. 57.