APA (7th ed.) Citation

United States. Army. Air Corps. (1927). Progress reports on experimental metal spars (Airplane Branch report). U.S. GPO.

Chicago Style (17th ed.) Citation

United States. Army. Air Corps. Progress Reports on Experimental Metal Spars (Airplane Branch Report). Washington: U.S. GPO, 1927.

MLA (9th ed.) Citation

United States. Army. Air Corps. Progress Reports on Experimental Metal Spars (Airplane Branch Report). U.S. GPO, 1927.

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