APA (7th ed.) Citation

United States. Army. Corps of Engineers. (1919). Pamphlet on evolution of art of fortification. U.S. GPO.

Chicago Style (17th ed.) Citation

United States. Army. Corps of Engineers. Pamphlet on Evolution of Art of Fortification. Washington: U.S. GPO, 1919.

MLA (9th ed.) Citation

United States. Army. Corps of Engineers. Pamphlet on Evolution of Art of Fortification. U.S. GPO, 1919.

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