Cleaves, A. B., & Stephenson, R. C. (1949). Guidebook to the geology of the Pennsylvania Turnpike: Carlisle to Irwin. Dept. of Internal Affairs, Topographic and Geologic Survey.
Chicago Style (17th ed.) CitationCleaves, Arthur B., and Robert Charles Stephenson. Guidebook to the Geology of the Pennsylvania Turnpike: Carlisle to Irwin. [Harrisburg]: Dept. of Internal Affairs, Topographic and Geologic Survey, 1949.
MLA (9th ed.) CitationCleaves, Arthur B., and Robert Charles Stephenson. Guidebook to the Geology of the Pennsylvania Turnpike: Carlisle to Irwin. Dept. of Internal Affairs, Topographic and Geologic Survey, 1949.
Warning: These citations may not always be 100% accurate.