APA (7th ed.) Citation

United States. National Advisory Committee for Aeronautics. (1937). Armstrong Whitworth 27 "Ensign" commercial airplane (British): An all-metal high-wing monoplane. National Advisory Committee for Aeronautics.

Chicago Style (17th ed.) Citation

United States. National Advisory Committee for Aeronautics. Armstrong Whitworth 27 "Ensign" Commercial Airplane (British): An All-metal High-wing Monoplane. Washington, [D.C.]: National Advisory Committee for Aeronautics, 1937.

MLA (9th ed.) Citation

United States. National Advisory Committee for Aeronautics. Armstrong Whitworth 27 "Ensign" Commercial Airplane (British): An All-metal High-wing Monoplane. National Advisory Committee for Aeronautics, 1937.