APA (7th ed.) Citation

National Geophysical Data Centre (U.S), National Geodetic Survey (U.S.), & Hittelman, A. M. (1992). Gravity: Earth System Data. United States Dept. of Commerce.

Chicago Style (17th ed.) Citation

National Geophysical Data Centre (U.S), National Geodetic Survey (U.S.), and Allen M. Hittelman. Gravity: Earth System Data. Boulder, Col.: United States Dept. of Commerce, 1992.

MLA (8th ed.) Citation

National Geophysical Data Centre (U.S), et al. Gravity: Earth System Data. United States Dept. of Commerce, 1992.