APA (7th ed.) Citation

United States. Army. Chemical Corps. Gas Defense Division. (1918). Help us give him the best gas mask. Gas Defense Division, Chemical Warfare Service.

Chicago Style (17th ed.) Citation

United States. Army. Chemical Corps. Gas Defense Division. Help Us Give Him the Best Gas Mask. New York, N.Y.: Gas Defense Division, Chemical Warfare Service, 1918.

MLA (9th ed.) Citation

United States. Army. Chemical Corps. Gas Defense Division. Help Us Give Him the Best Gas Mask. Gas Defense Division, Chemical Warfare Service, 1918.