APA (7th ed.) Citation

United States. Army. Chemical Warfare Service. (1920). Chemical warfare, Vol. 4. Edgewood, Md..

Chicago Style (17th ed.) Citation

United States. Army. Chemical Warfare Service. Chemical Warfare, Vol. 4. [Washington]: Edgewood, Md., 1920.

MLA (9th ed.) Citation

United States. Army. Chemical Warfare Service. Chemical Warfare, Vol. 4. Edgewood, Md., 1920.

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