APA (7th ed.) Citation

Hittelman, A. M., Scheibe, D., & Goad, C. C. (1982). U.S. land gravity. National Geophysical Data Center, NOAA.

Chicago Style (17th ed.) Citation

Hittelman, Allen M., Donald Scheibe, and Clyde C. Goad. U.S. Land Gravity. Boulder, Colo.: National Geophysical Data Center, NOAA, 1982.

MLA (9th ed.) Citation

Hittelman, Allen M., et al. U.S. Land Gravity. National Geophysical Data Center, NOAA, 1982.