Seventh map, or map of 1776 : [of the east coast of the United States].

Chicago citation style
Seventh map, or map of 1776 : [of the east coast of the United States].. 1780-1789. Retrieved from the Digital Public Library of America, http://digital.libraries.psu.edu/cdm/ref/collection/maps1/id/29946. (Accessed December 11, 2018.)
APA citation style
(1780-1789) Seventh map, or map of 1776 : [of the east coast of the United States].. Retrieved from the Digital Public Library of America, http://digital.libraries.psu.edu/cdm/ref/collection/maps1/id/29946
MLA citation style
Retrieved from the Digital Public Library of America <http://digital.libraries.psu.edu/cdm/ref/collection/maps1/id/29946>.
Note: These citations are programmatically generated and may be incomplete.