National Research Council (U.S.). Space Studies Board. Aeronautics and Space Engineering Board. Division on Engineering and Physical Sciences & ebrary, Inc. (2004). Issues and opportunities regarding the U.S. space program: A summary report of a workshop on national space policy. National Academies Press.
Lua i Stíl Chicago (17ú heag.)National Research Council (U.S.). Space Studies Board. Aeronautics and Space Engineering Board. Division on Engineering and Physical Sciences agus Inc ebrary. Issues and Opportunities Regarding the U.S. Space Program: A Summary Report of a Workshop on National Space Policy. Washington, D.C.: National Academies Press, 2004.
Lua MLA (9ú heag.)National Research Council (U.S.). Space Studies Board. Aeronautics and Space Engineering Board. Division on Engineering and Physical Sciences agus Inc ebrary. Issues and Opportunities Regarding the U.S. Space Program: A Summary Report of a Workshop on National Space Policy. National Academies Press, 2004.