Simple span over the Allegheny River (print number 5305)

Chicago citation style
R.W. Johnston (Pittsburgh, Pa.). Simple span over the Allegheny River (print number 5305). Undated. Retrieved from the Digital Public Library of America, http://digital.libraries.psu.edu/cdm/ref/collection/pab/id/365. (Accessed December 11, 2018.)
APA citation style
R.W. Johnston (Pittsburgh, Pa.), (Undated) Simple span over the Allegheny River (print number 5305). Retrieved from the Digital Public Library of America, http://digital.libraries.psu.edu/cdm/ref/collection/pab/id/365
MLA citation style
R.W. Johnston (Pittsburgh, Pa.). Retrieved from the Digital Public Library of America <http://digital.libraries.psu.edu/cdm/ref/collection/pab/id/365>.
Note: These citations are programmatically generated and may be incomplete.