APA (7th ed.) Citation

National Archives Establishment (U.S.). (1942). Historical Units of Agencies of the First World War. [s.n.].

Chicago Style (17th ed.) Citation

National Archives Establishment (U.S.). Historical Units of Agencies of the First World War. [Washington]: [s.n.], 1942.

MLA (9th ed.) Citation

National Archives Establishment (U.S.). Historical Units of Agencies of the First World War. [s.n.], 1942.

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