APA (7th ed.) Citation

United States. Department of Commerce. (1923). Universal and fireman's gas masks. GPO.

Chicago Style (17th ed.) Citation

United States. Department of Commerce. Universal and Fireman's Gas Masks. [Washington]: GPO, 1923.

MLA (9th ed.) Citation

United States. Department of Commerce. Universal and Fireman's Gas Masks. GPO, 1923.

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