National Research Council (U.S.). Committee on Gravitational Physics & ebrary, Inc. (1999). Gravitational physics: Exploring the structure of space and time. National Academy Press.
芝加哥风格引文National Research Council (U.S.). Committee on Gravitational Physics 与 Inc ebrary. Gravitational Physics: Exploring the Structure of Space and Time. Washington, DC: National Academy Press, 1999.
MLA引文National Research Council (U.S.). Committee on Gravitational Physics 与 Inc ebrary. Gravitational Physics: Exploring the Structure of Space and Time. National Academy Press, 1999.
警告：这些引文格式不一定是100％准确.