APA (7th ed.) Citation

Schafer, J., & Sajna, M. (1992). The Allegheny River: Watershed of the nation. Pennsylvania State University Press.

Chicago Style (17th ed.) Citation

Schafer, Jim, and Mike Sajna. The Allegheny River: Watershed of the Nation. University Park, Pa.: Pennsylvania State University Press, 1992.

MLA (9th ed.) Citation

Schafer, Jim, and Mike Sajna. The Allegheny River: Watershed of the Nation. Pennsylvania State University Press, 1992.