APA (7th ed.) Citation

United States. Army. Air Corps. (1920). Report of test of 37-mm. automatic cannon in cannon engine. U.S. GPO.

Chicago Style (17th ed.) Citation

United States. Army. Air Corps. Report of Test of 37-mm. Automatic Cannon in Cannon Engine. Washington: U.S. GPO, 1920.

MLA (9th ed.) Citation

United States. Army. Air Corps. Report of Test of 37-mm. Automatic Cannon in Cannon Engine. U.S. GPO, 1920.

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