APA (7th ed.) Citation

United States. War Department. War Plans Division. (1918). Gas warfare: Part II. Methods of defense against gas attacks. [publisher not identified].

Chicago Style (17th ed.) Citation

United States. War Department. War Plans Division. Gas Warfare: Part II. Methods of Defense Against Gas Attacks. [Washington]: [publisher not identified], 1918.

MLA (9th ed.) Citation

United States. War Department. War Plans Division. Gas Warfare: Part II. Methods of Defense Against Gas Attacks. [publisher not identified], 1918.