APA (7th ed.) Citation

Weir, G. W., Peterson, W. L., & Swadley, W. C. (1979). Lithofacies and stratigraphic nomenclature of part of the Upper Ordovician section of Kentucky. U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Weir, Gordon W., Warren Lee Peterson, and W. C. Swadley. Lithofacies and Stratigraphic Nomenclature of Part of the Upper Ordovician Section of Kentucky. Reston, Va.: U.S. Geological Survey, 1979.

MLA (9th ed.) Citation

Weir, Gordon W., et al. Lithofacies and Stratigraphic Nomenclature of Part of the Upper Ordovician Section of Kentucky. U.S. Geological Survey, 1979.