APA (7th ed.) Citation

United States. War Department. (1920). Corps of Engineers: Maps and mapping. GPO.

Chicago Style (17th ed.) Citation

United States. War Department. Corps of Engineers: Maps and Mapping. [Washington]: GPO, 1920.

MLA (9th ed.) Citation

United States. War Department. Corps of Engineers: Maps and Mapping. GPO, 1920.

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