APA (7th ed.) Citation

United States. Army. Signal Corps. (1918). Air Service handbook: Vol. 1. Aviation Section, Signal Corps. U.S. GPO.

Chicago Style (17th ed.) Citation

United States. Army. Signal Corps. Air Service Handbook: Vol. 1. Aviation Section, Signal Corps. Washington: U.S. GPO, 1918.

MLA (9th ed.) Citation

United States. Army. Signal Corps. Air Service Handbook: Vol. 1. Aviation Section, Signal Corps. U.S. GPO, 1918.