APA (7th ed.) Citation

United States. Army. Air Corps. (1921). Standard engine test of Almen "barrel" type engine. U.S. GPO.

Chicago Style (17th ed.) Citation

United States. Army. Air Corps. Standard Engine Test of Almen "Barrel" Type Engine. Washington: U.S. GPO, 1921.

MLA (9th ed.) Citation

United States. Army. Air Corps. Standard Engine Test of Almen "Barrel" Type Engine. U.S. GPO, 1921.

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