APA (7th ed.) Citation

Miller, B. L., Fraser, D. M., Miller, R. L., Willard, B., Meyers, P. B., Behre, C. H., & Warmkessel, C. A. (1939). Northampton County, Pennsylvania: Geology and geography. Department of Internal Affairs, Topographic and Geologic Survey.

Chicago Style (17th ed.) Citation

Miller, Benjamin L., Donald McCoy Fraser, Ralph L. Miller, Bradford Willard, Philip B. Meyers, Chas. H. Behre, and Carl A. Warmkessel. Northampton County, Pennsylvania: Geology and Geography. Harrisburg, Pa.: Department of Internal Affairs, Topographic and Geologic Survey, 1939.

MLA (9th ed.) Citation

Miller, Benjamin L., et al. Northampton County, Pennsylvania: Geology and Geography. Department of Internal Affairs, Topographic and Geologic Survey, 1939.