APA (7th ed.) Citation

Johnsen lhFrederick A. B-17 flying fortress: The symbol of second world war air power.

Chicago Style (17th ed.) Citation

Johnsen lhFrederick A. B-17 Flying Fortress: The Symbol of Second World War Air Power. New York lbMcGraw Hill lc2000.

MLA (9th ed.) Citation

Johnsen lhFrederick A. B-17 Flying Fortress: The Symbol of Second World War Air Power.

Warning: These citations may not always be 100% accurate.