APA (7th ed.) Citation

Swetnam, G., & Smith, H. (1976). A guidebook to historic western Pennsylvania. University of Pittsburgh Press.

Chicago Style (17th ed.) Citation

Swetnam, George, and Helene Smith. A Guidebook to Historic Western Pennsylvania. [Pittsburgh]: University of Pittsburgh Press, 1976.

MLA (9th ed.) Citation

Swetnam, George, and Helene Smith. A Guidebook to Historic Western Pennsylvania. University of Pittsburgh Press, 1976.