Pittsburgh Railways Company three hinged arch bridge over the Monongahela River, 22nd Street, Pittsburgh, Pennsylvania (print number 5252)

Chicago citation style
C.K. Mohler. Pittsburgh Railways Company three hinged arch bridge over the Monongahela River, 22nd Street, Pittsburgh, Pennsylvania (print number 5252). 1906. Retrieved from the Digital Public Library of America, http://digital.libraries.psu.edu/cdm/ref/collection/pab/id/438. (Accessed December 12, 2018.)
APA citation style
C.K. Mohler, (1906) Pittsburgh Railways Company three hinged arch bridge over the Monongahela River, 22nd Street, Pittsburgh, Pennsylvania (print number 5252). Retrieved from the Digital Public Library of America, http://digital.libraries.psu.edu/cdm/ref/collection/pab/id/438
MLA citation style
C.K. Mohler. Retrieved from the Digital Public Library of America <http://digital.libraries.psu.edu/cdm/ref/collection/pab/id/438>.
Note: These citations are programmatically generated and may be incomplete.