Tham khảo Boeing_XPBB_Sea_Ranger

Ghi chú
  1. Green 1968, p.146.
Tài liệu
  • Bowers, Peter M. (1989). Boeing Aircraft since 1916. London: Putnam. ISBN 0-85177-804-6.
  • Boniface, Patrick. “Boeing's Lone Ranger”. Aeroplane Monthly. IPC (January 1997): pp. 54–57. |(các) trang= có văn bản dư (trợ giúp)
  • Green, William (1968). War Planes of the Second World War: Volume Five Flying Boats. London: Macdonald. ISBN 0-356-01449-5.
  • Winchester, Jim (2005). The World's Worst Aircraft. New York: Amber Books. ISBN 0-7607-8714-X.
  • Boeing XPBB-1