APA (7th ed.) Citation

United States. Army. Air Corps. (1918). Notes on guns, gears, and sights. [publisher not identified].

Chicago Style (17th ed.) Citation

United States. Army. Air Corps. Notes on Guns, Gears, and Sights. [Place of publication not identified]: [publisher not identified], 1918.

MLA (9th ed.) Citation

United States. Army. Air Corps. Notes on Guns, Gears, and Sights. [publisher not identified], 1918.