APA (7th ed.) Citation

(1923). Machine gun: Technique of machine-gun fire, direct laying. GPO.

Chicago Style (17th ed.) Citation

Machine Gun: Technique of Machine-gun Fire, Direct Laying. [Washington]: GPO, 1923.

MLA (9th ed.) Citation

Machine Gun: Technique of Machine-gun Fire, Direct Laying. GPO, 1923.

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