Boyertown, Pa. [1902]

Chicago citation style
Sanborn Map Company. Boyertown, Pa. [1902]. 1902. Retrieved from the Digital Public Library of America, http://digital.libraries.psu.edu/cdm/ref/collection/maps1/id/4455. (Accessed December 16, 2018.)
APA citation style
Sanborn Map Company, (1902) Boyertown, Pa. [1902]. Retrieved from the Digital Public Library of America, http://digital.libraries.psu.edu/cdm/ref/collection/maps1/id/4455
MLA citation style
Sanborn Map Company. Retrieved from the Digital Public Library of America <http://digital.libraries.psu.edu/cdm/ref/collection/maps1/id/4455>.
Note: These citations are programmatically generated and may be incomplete.