Constructing a caisson, Tacoma Narrow Bridge, ca. 1939

Chicago citation style
[probably Simmer]. Constructing a caisson, Tacoma Narrow Bridge, ca. 1939. ca. 1939. Retrieved from the Digital Public Library of America, http://cdm16786.contentdm.oclc.org/cdm/ref/collection/farquharson/id/61. (Accessed June 21, 2018.)
APA citation style
[probably Simmer], (ca. 1939) Constructing a caisson, Tacoma Narrow Bridge, ca. 1939. Retrieved from the Digital Public Library of America, http://cdm16786.contentdm.oclc.org/cdm/ref/collection/farquharson/id/61
MLA citation style
[probably Simmer]. Retrieved from the Digital Public Library of America <http://cdm16786.contentdm.oclc.org/cdm/ref/collection/farquharson/id/61>.
Note: These citations are programmatically generated and may be incomplete.