APA (7th ed.) Citation

United States. Army. Air Corps. (1921). One hundred hour endurance flight test of model 1-A Brewster-Goldsmith spark plugs. U.S. GPO.

Chicago Style (17th ed.) Citation

United States. Army. Air Corps. One Hundred Hour Endurance Flight Test of Model 1-A Brewster-Goldsmith Spark Plugs. Washington: U.S. GPO, 1921.

MLA (9th ed.) Citation

United States. Army. Air Corps. One Hundred Hour Endurance Flight Test of Model 1-A Brewster-Goldsmith Spark Plugs. U.S. GPO, 1921.

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