United States. Army. Air Corps. (1921). Notes on airplane flight endurance (I). U.S. GPO.
Chicago Style (17th ed.) CitationUnited States. Army. Air Corps. Notes on Airplane Flight Endurance (I). Washington: U.S. GPO, 1921.
MLA (9th ed.) CitationUnited States. Army. Air Corps. Notes on Airplane Flight Endurance (I). U.S. GPO, 1921.
Warning: These citations may not always be 100% accurate.