United States. National Aeronautics and Space Administration. (1990). Astronaut fact book. National Aeronautics and Space Administration.
Chicago Style (17th ed.) CitationUnited States. National Aeronautics and Space Administration. Astronaut Fact Book. [Washington, D.C.?]: National Aeronautics and Space Administration, 1990.
MLA (9th ed.) CitationUnited States. National Aeronautics and Space Administration. Astronaut Fact Book. National Aeronautics and Space Administration, 1990.
Warning: These citations may not always be 100% accurate.