National Research Council (U.S.). Committee on Gravitational Physics & ebrary, Inc. (1999). Gravitational physics: Exploring the structure of space and time. National Academy Press.
Chicago-referens (17:e uppl.)National Research Council (U.S.). Committee on Gravitational Physics och Inc ebrary. Gravitational Physics: Exploring the Structure of Space and Time. Washington, DC: National Academy Press, 1999.
MLA-referens (9:e uppl.)National Research Council (U.S.). Committee on Gravitational Physics och Inc ebrary. Gravitational Physics: Exploring the Structure of Space and Time. National Academy Press, 1999.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.