Bureau of Maintenance and Operations (January 2015). Roadway Management System Straight Line Diagrams (Report) (2015 ed.). Pennsylvania Department of Transportation. Retrieved December 20, 2015.
Tourist Map of Pennsylvania(PDF) (Map). Pennsylvania Department of Highways. 1930. Archived from the original(PDF) on July 5, 2011. Retrieved June 24, 2010.
Official Map of Pennsylvania(PDF) (Map). Pennsylvania Department of Highways. 1970. Archived from the original(PDF) on July 5, 2011. Retrieved December 17, 2014.