PW-9 (航空機)
Bowers, Peter M. Boeing Aircraft since 1916. London: Putnam, Second edition 1989. ISBN 0-85177-804-6.
Lloyd S. Jones, U.S. Naval Fighters Fallbrook CA: Aero Publishers, 1977, pp. 35-38. ISBN 0-8168-9254-7.
Swanborough, Gordon and Bowers, Peter M. United States Navy Aircraft since 1911. London: Putnam. Second edition 1976. ISBN 0 370 10054 9.