APA (7th ed.) Citation

National Geophysical Data Center. (1993). Volcanic rocks. U.S. Dept. of Commerce, National Oceanic and Atmospheric Administration, National Geophysical Data Center.

Chicago Style (17th ed.) Citation

National Geophysical Data Center. Volcanic Rocks. Boulder, Colo. (325 Broadway, Boulder 80303): U.S. Dept. of Commerce, National Oceanic and Atmospheric Administration, National Geophysical Data Center, 1993.

MLA (9th ed.) Citation

National Geophysical Data Center. Volcanic Rocks. U.S. Dept. of Commerce, National Oceanic and Atmospheric Administration, National Geophysical Data Center, 1993.