APA (7th ed.) Citation

United States. Army. Air Corps. (1918). Methods of obtaining and transmitting information by balloon service. U.S. GPO.

Chicago Style (17th ed.) Citation

United States. Army. Air Corps. Methods of Obtaining and Transmitting Information by Balloon Service. Washington: U.S. GPO, 1918.

MLA (9th ed.) Citation

United States. Army. Air Corps. Methods of Obtaining and Transmitting Information by Balloon Service. U.S. GPO, 1918.

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