APA (7th ed.) Citation

United States. National Aeronautics and Space Administration. (1990). One step to space: The X-30 National Aero-Space Plane. National Aeronautics and Space Administration.

Chicago Style (17th ed.) Citation

United States. National Aeronautics and Space Administration. One Step to Space: The X-30 National Aero-Space Plane. [Washington, D.C.?]: National Aeronautics and Space Administration, 1990.

MLA (9th ed.) Citation

United States. National Aeronautics and Space Administration. One Step to Space: The X-30 National Aero-Space Plane. National Aeronautics and Space Administration, 1990.