APA (7th ed.) Citation

United States. Army. Air Corps. (1921). Vacuum nonfrosting goggles (Equipment Section test report). U.S. GPO.

Chicago Style (17th ed.) Citation

United States. Army. Air Corps. Vacuum Nonfrosting Goggles (Equipment Section Test Report). Washington: U.S. GPO, 1921.

MLA (9th ed.) Citation

United States. Army. Air Corps. Vacuum Nonfrosting Goggles (Equipment Section Test Report). U.S. GPO, 1921.

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