APA (7th ed.) Citation

Guevara, E. H., Breton, C., & Hackley, P. C. (2006). Coal rank and stratigraphy of Pennsylvanian coal and coaly shale samples, Young County, north-central Texas (Version 1.0.). U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Guevara, Edgar H., Caroline Breton, and Paul C. Hackley. Coal Rank and Stratigraphy of Pennsylvanian Coal and Coaly Shale Samples, Young County, North-central Texas. Version 1.0. Reston, Va.: U.S. Geological Survey, 2006.

MLA (9th ed.) Citation

Guevara, Edgar H., et al. Coal Rank and Stratigraphy of Pennsylvanian Coal and Coaly Shale Samples, Young County, North-central Texas. Version 1.0. U.S. Geological Survey, 2006.