National Research Council (U.S.). Committee on Gravitational Physics & ebrary, Inc. (1999). Gravitational physics: Exploring the structure of space and time. National Academy Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNational Research Council (U.S.). Committee on Gravitational Physics और Inc ebrary. Gravitational Physics: Exploring the Structure of Space and Time. Washington, DC: National Academy Press, 1999.
एमएलए (9वां संस्करण) प्रशस्ति पत्रNational Research Council (U.S.). Committee on Gravitational Physics और Inc ebrary. Gravitational Physics: Exploring the Structure of Space and Time. National Academy Press, 1999.
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