Construction at the west end of the floating bridge, ca. July 1, 1939

Chicago citation style
Unknown. Construction at the west end of the floating bridge, ca. July 1, 1939. 1939. Retrieved from the Digital Public Library of America, http://cdm16786.contentdm.oclc.org/cdm/ref/collection/imlsmohai/id/6526. (Accessed June 21, 2018.)
APA citation style
Unknown, (1939) Construction at the west end of the floating bridge, ca. July 1, 1939. Retrieved from the Digital Public Library of America, http://cdm16786.contentdm.oclc.org/cdm/ref/collection/imlsmohai/id/6526
MLA citation style
Unknown. Retrieved from the Digital Public Library of America <http://cdm16786.contentdm.oclc.org/cdm/ref/collection/imlsmohai/id/6526>.
Note: These citations are programmatically generated and may be incomplete.