APA (7th ed.) Citation

United States. Army. (1920). Synopsis of military subjects for instruction of balloon observers. U.S. GPO.

Chicago Style (17th ed.) Citation

United States. Army. Synopsis of Military Subjects for Instruction of Balloon Observers. Washington: U.S. GPO, 1920.

MLA (9th ed.) Citation

United States. Army. Synopsis of Military Subjects for Instruction of Balloon Observers. U.S. GPO, 1920.

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