APA (7th ed.) Citation

National Materials Advisory Board (U.S.). (1979). Materials for helicopter gears. National Aeronautics and Space Administration.

Chicago Style (17th ed.) Citation

National Materials Advisory Board (U.S.). Materials for Helicopter Gears. [Washington, D.C.]: National Aeronautics and Space Administration, 1979.

MLA (9th ed.) Citation

National Materials Advisory Board (U.S.). Materials for Helicopter Gears. National Aeronautics and Space Administration, 1979.