A map of the area in dispute between Pennsylvania and Maryland.

Chicago citation style
A map of the area in dispute between Pennsylvania and Maryland.. Retrieved from the Digital Public Library of America, http://collection1.libraries.psu.edu/cdm/ref/collection/maps1/id/30077. (Accessed September 18, 2018.)
APA citation style
A map of the area in dispute between Pennsylvania and Maryland.. Retrieved from the Digital Public Library of America, http://collection1.libraries.psu.edu/cdm/ref/collection/maps1/id/30077
MLA citation style
Retrieved from the Digital Public Library of America <http://collection1.libraries.psu.edu/cdm/ref/collection/maps1/id/30077>.
Note: These citations are programmatically generated and may be incomplete.