APA (7th ed.) Citation

Small, T. A., & Ozuna, G. B. (1993). Ground-water conditions in Pecos County, Texas, 1987. U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Small, Ted A., and G. B. Ozuna. Ground-water Conditions in Pecos County, Texas, 1987. Austin, Texas: U.S. Geological Survey, 1993.

MLA (9th ed.) Citation

Small, Ted A., and G. B. Ozuna. Ground-water Conditions in Pecos County, Texas, 1987. U.S. Geological Survey, 1993.