APA (7th ed.) Citation

United States. Army. Air Corps. (1920). N.C.L. observation balloon winch. U.S. GPO.

Chicago Style (17th ed.) Citation

United States. Army. Air Corps. N.C.L. Observation Balloon Winch. Washington: U.S. GPO, 1920.

MLA (9th ed.) Citation

United States. Army. Air Corps. N.C.L. Observation Balloon Winch. U.S. GPO, 1920.

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