APA (7th ed.) Citation

National Earthquake Information Center, World Data Center A for Seismology, Geological Survey (U.S.), & Goter, S. K. (1988). Map showing global distribution of first-motion focal mechanisms, 1981-1985. Dept. of the Interior, U.S. Geological Survey.

Chicago Style (17th ed.) Citation

National Earthquake Information Center, World Data Center A for Seismology, Geological Survey (U.S.), and Susan K. Goter. Map Showing Global Distribution of First-motion Focal Mechanisms, 1981-1985. Reston, Va.: Dept. of the Interior, U.S. Geological Survey, 1988.

MLA (9th ed.) Citation

National Earthquake Information Center, et al. Map Showing Global Distribution of First-motion Focal Mechanisms, 1981-1985. Dept. of the Interior, U.S. Geological Survey, 1988.