APA (7th ed.) Citation

United States. War Department. (1929). Air Corps: Bomb rack, external, type H-4. GPO.

Chicago Style (17th ed.) Citation

United States. War Department. Air Corps: Bomb Rack, External, Type H-4. [Washington]: GPO, 1929.

MLA (9th ed.) Citation

United States. War Department. Air Corps: Bomb Rack, External, Type H-4. GPO, 1929.

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