Tham khảo Pemberton-Billing P.B.9

Ghi chú

  1. ↑ Thetford 1958 p.379
  2. Orbis 1985, p. 2694

Tài liệu

  • The Illustrated Encyclopedia of Aircraft (Part Work 1982-1985). Orbis Publishing.
  • Mason, Francis K. (1992). The British Fighter since 1912. Annapolis, Maryland, USA: Naval Institute Press. ISBN 1-55750-082-7.
  • Thetford, Owen (1958). British Naval Aircraft 1912-58. London: Putnam Publishing. tr. 379.