The great bridge, Richmond, Va., USA (6621)

Chicago citation style
The great bridge, Richmond, Va., USA (6621). 1891. Retrieved from the Digital Public Library of America, http://cdm.lib.lehigh.edu/cdm/ref/collection/postal/id/3225. (Accessed September 20, 2018.)
APA citation style
(1891) The great bridge, Richmond, Va., USA (6621). Retrieved from the Digital Public Library of America, http://cdm.lib.lehigh.edu/cdm/ref/collection/postal/id/3225
MLA citation style
Retrieved from the Digital Public Library of America <http://cdm.lib.lehigh.edu/cdm/ref/collection/postal/id/3225>.
Note: These citations are programmatically generated and may be incomplete.