APA Citation

Halma, R., & Oplinger, C. S. (2001). The Lehigh Valley: A natural and environmental history. University Park, Pa.: Pennsylvania State University Press.

Chicago Style Citation

Halma, Robert, and Carl S. Oplinger. The Lehigh Valley: A Natural and Environmental History. University Park, Pa.: Pennsylvania State University Press, 2001.

MLA Citation

Halma, Robert, and Carl S. Oplinger. The Lehigh Valley: A Natural and Environmental History. University Park, Pa.: Pennsylvania State University Press, 2001.

Warning: These citations may not always be 100% accurate.