Faill, R. T., & Wells, R. B. (1974). Geology and mineral resources of the Millerstown Quadrangle, Perry, Juniata, and Snyder Counties, Pennsylvania. Commonwealth of Pennsylvania, Dept. of Environmental Resources, Bureau of Topographic and Geologic Survey.
Citazione stile Chigago Style (17a edizione)Faill, Rodger T., e Richard B. Wells. Geology and Mineral Resources of the Millerstown Quadrangle, Perry, Juniata, and Snyder Counties, Pennsylvania. [Harrisburg]: Commonwealth of Pennsylvania, Dept. of Environmental Resources, Bureau of Topographic and Geologic Survey, 1974.
Citatione MLA (9a ed.)Faill, Rodger T., e Richard B. Wells. Geology and Mineral Resources of the Millerstown Quadrangle, Perry, Juniata, and Snyder Counties, Pennsylvania. Commonwealth of Pennsylvania, Dept. of Environmental Resources, Bureau of Topographic and Geologic Survey, 1974.