National Research Council (U.S.). Committee on the Future of the Global Positioning System & National Research Council (U.S.). Commission on Engineering and Technical Systems. (1995). The Global Positioning System: A shared national asset : recommendations for technical improvements and enhancements. National Academy Press.
Παραπομπή σε μορφή Chicago (17η εκδ.)National Research Council (U.S.). Committee on the Future of the Global Positioning System και National Research Council (U.S.). Commission on Engineering and Technical Systems. The Global Positioning System: A Shared National Asset : Recommendations for Technical Improvements and Enhancements. Washington, D.C.: National Academy Press, 1995.
Παραπομπή σε μορφή MLA (8th εκδ.)National Research Council (U.S.). Committee on the Future of the Global Positioning System και National Research Council (U.S.). Commission on Engineering and Technical Systems. The Global Positioning System: A Shared National Asset : Recommendations for Technical Improvements and Enhancements. National Academy Press, 1995.