Boeing XP-4 (Italian Wikipedia)

Analysis of information sources in references of the Wikipedia article "Boeing XP-4" in Italian language version.

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archive.org

Angelucci 1987, pp. 71-72. (EN) Enzo Angelucci, The American Fighter from 1917 to the present, New York, Orion Books, 1987, ISBN 0-517-56588-9.
Dorr e Donald 1990, pp. 33-34. (EN) Robert F. Dorr, David Donald, Fighters of the United States Air Force, London, Temple, 1990, ISBN 0-600-55094-X.
Jones 1975, pp. 20-22. (EN) Lloyd S. Jones, U.S. Fighters: Army-Air Force 1925 to 1980s, Fallbrook, California, Aero Publishers Inc., 1975, ISBN 0-8168-9200-8.

Rickard 2014, Boeing XP-4 (Model 58). (EN) John Rickard, Boeing XP-4 (Model 58), su historyofwar.org, http://www.historyofwar.org/mainindexframe.html, 20 giugno 2014. URL consultato il 18 giugno 2020.

Baugher 1998, Boeing XP-4. (EN) Joseph F. Baugher, Boeing XP-4, su American Military Aircraft, http://www.joebaugher.com/uscombataircraft.html, 6 giugno 1998. URL consultato il 18 giugno 2020.