APA (7th ed.) Citation

United States. War Department. (1942). 81-MM mortar M1. U.S. Govt. Printing Office.

Chicago Style (17th ed.) Citation

United States. War Department. 81-MM Mortar M1. Washington: U.S. Govt. Printing Office, 1942.

MLA (9th ed.) Citation

United States. War Department. 81-MM Mortar M1. U.S. Govt. Printing Office, 1942.

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