APA (7th ed.) Citation

Popa, T. A. (1996). Po Valley. U.S. Army Center of Military History : For sale by the U.S. G.P.O., Supt. of Docs..

Chicago Style (17th ed.) Citation

Popa, Thomas A. Po Valley. Washington, DC: U.S. Army Center of Military History : For sale by the U.S. G.P.O., Supt. of Docs., 1996.

MLA (8th ed.) Citation

Popa, Thomas A. Po Valley. U.S. Army Center of Military History : For sale by the U.S. G.P.O., Supt. of Docs., 1996.