National Research Council (U.S.). Committee on the Rationale and Goals of the U.S. Civil Space Program & ebrary, Inc. (2009). America's future in space: Aligning the civil space program with national needs. National Academies Press.
Dyfyniad Arddull ChicagoNational Research Council (U.S.). Committee on the Rationale and Goals of the U.S. Civil Space Program and Inc ebrary. America's Future in Space: Aligning the Civil Space Program with National Needs. Washington, D.C.: National Academies Press, 2009.
Dyfyniad MLANational Research Council (U.S.). Committee on the Rationale and Goals of the U.S. Civil Space Program and Inc ebrary. America's Future in Space: Aligning the Civil Space Program with National Needs. National Academies Press, 2009.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.