Profile of rock on a state highway in Pennsylvania

Chicago citation style
Profile of rock on a state highway in Pennsylvania. 1930-1945. Retrieved from the Digital Public Library of America, http://ark.digitalcommonwealth.org/ark:/50959/4m90dx61p. (Accessed June 20, 2018.)
APA citation style
(1930-1945) Profile of rock on a state highway in Pennsylvania. Retrieved from the Digital Public Library of America, http://ark.digitalcommonwealth.org/ark:/50959/4m90dx61p
MLA citation style
Retrieved from the Digital Public Library of America <http://ark.digitalcommonwealth.org/ark:/50959/4m90dx61p>.
Note: These citations are programmatically generated and may be incomplete.