Cranes on top of a caisson,Tacoma Narrows Bridge construction, ca. 1939

Chicago citation style
[probably Simmer]. Cranes on top of a caisson,Tacoma Narrows Bridge construction, ca. 1939. ca. 1939. Retrieved from the Digital Public Library of America, http://cdm16786.contentdm.oclc.org/cdm/ref/collection/farquharson/id/87. (Accessed August 17, 2018.)
APA citation style
[probably Simmer], (ca. 1939) Cranes on top of a caisson,Tacoma Narrows Bridge construction, ca. 1939. Retrieved from the Digital Public Library of America, http://cdm16786.contentdm.oclc.org/cdm/ref/collection/farquharson/id/87
MLA citation style
[probably Simmer]. Retrieved from the Digital Public Library of America <http://cdm16786.contentdm.oclc.org/cdm/ref/collection/farquharson/id/87>.
Note: These citations are programmatically generated and may be incomplete.