APA (7th ed.) Citation

Geological Survey (U.S.), Gray, J. E., & Page, W. R. (2008). Geological, geochemical, and geophysical studies by the U.S. Geological Survey in Big Bend National Park, Texas. U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Geological Survey (U.S.), John E. Gray, and William R. Page. Geological, Geochemical, and Geophysical Studies by the U.S. Geological Survey in Big Bend National Park, Texas. Reston, Va.: U.S. Geological Survey, 2008.

MLA (9th ed.) Citation

Geological Survey (U.S.), et al. Geological, Geochemical, and Geophysical Studies by the U.S. Geological Survey in Big Bend National Park, Texas. U.S. Geological Survey, 2008.