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.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)National Research Council (U.S.). Committee on the Future of the Global Positioning System و 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.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)National Research Council (U.S.). Committee on the Future of the Global Positioning System و 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.