Sewickley, Allegheny Co., Pa., May 1895.

Chicago citation style
Sanborn-Perris Map Co. Sewickley, Allegheny Co., Pa., May 1895.. 1895. Retrieved from the Digital Public Library of America, http://digital.libraries.psu.edu/cdm/ref/collection/maps1/id/23954. (Accessed December 14, 2018.)
APA citation style
Sanborn-Perris Map Co, (1895) Sewickley, Allegheny Co., Pa., May 1895.. Retrieved from the Digital Public Library of America, http://digital.libraries.psu.edu/cdm/ref/collection/maps1/id/23954
MLA citation style
Sanborn-Perris Map Co. Retrieved from the Digital Public Library of America <http://digital.libraries.psu.edu/cdm/ref/collection/maps1/id/23954>.
Note: These citations are programmatically generated and may be incomplete.