APA (7th ed.) Citation

United States. Army. Air Corps. (1919). Clocks for aerial navigation. U.S. GPO.

Chicago Style (17th ed.) Citation

United States. Army. Air Corps. Clocks for Aerial Navigation. Washington: U.S. GPO, 1919.

MLA (9th ed.) Citation

United States. Army. Air Corps. Clocks for Aerial Navigation. U.S. GPO, 1919.

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