APA (7th ed.) Citation

Hill, R. T. (1887). The present condition of knowledge of the geology of Texas. Department of the Interior, United States Geological Survey.

Chicago Style (17th ed.) Citation

Hill, Robert Thomas. The Present Condition of Knowledge of the Geology of Texas. Washington, D.C.: Department of the Interior, United States Geological Survey, 1887.

MLA (9th ed.) Citation

Hill, Robert Thomas. The Present Condition of Knowledge of the Geology of Texas. Department of the Interior, United States Geological Survey, 1887.