[Map of the great Venango oil basin]

Chicago citation style
[Map of the great Venango oil basin]. 1880-1889. Retrieved from the Digital Public Library of America, http://ark.digitalcommonwealth.org/ark:/50959/w9505s28b. (Accessed June 23, 2018.)
APA citation style
(1880-1889) [Map of the great Venango oil basin]. Retrieved from the Digital Public Library of America, http://ark.digitalcommonwealth.org/ark:/50959/w9505s28b
MLA citation style
Retrieved from the Digital Public Library of America <http://ark.digitalcommonwealth.org/ark:/50959/w9505s28b>.
Note: These citations are programmatically generated and may be incomplete.