APA (7th ed.) Citation

Havill, C. H., & United States. National Advisory Committee for Aeronautics. (1926). The drag of airships. National Advisory Committee for Aeronautics.

Chicago Style (17th ed.) Citation

Havill, Clinton H., and United States. National Advisory Committee for Aeronautics. The Drag of Airships. [Washington, D.C.]: National Advisory Committee for Aeronautics, 1926.

MLA (8th ed.) Citation

Havill, Clinton H., and United States. National Advisory Committee for Aeronautics. The Drag of Airships. National Advisory Committee for Aeronautics, 1926.