APA (7th ed.) Citation

National Geophysical Data Center. (1990). Earthquakes. [U.S. Dept. of Commerce, National Oceanic and Atmospheric Administration, National Geophysical Data Center].

Chicago Style (17th ed.) Citation

National Geophysical Data Center. Earthquakes. [Boulder, Colo.]: [U.S. Dept. of Commerce, National Oceanic and Atmospheric Administration, National Geophysical Data Center], 1990.

MLA (8th ed.) Citation

National Geophysical Data Center. Earthquakes. [U.S. Dept. of Commerce, National Oceanic and Atmospheric Administration, National Geophysical Data Center], 1990.