APA (7th ed.) Citation

Vaill, J. E., & Barks, J. H. (1980). Physical environment and hydrologic characteristics of coal-mining areas in Missouri. U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Vaill, J. E., and James H. Barks. Physical Environment and Hydrologic Characteristics of Coal-mining Areas in Missouri. Rolla, Missouri: U.S. Geological Survey, 1980.

MLA (9th ed.) Citation

Vaill, J. E., and James H. Barks. Physical Environment and Hydrologic Characteristics of Coal-mining Areas in Missouri. U.S. Geological Survey, 1980.