Unloading horses using pulley system from the steamer DORA, ca. 1912

Chicago citation style
Thwaites, John E. (John Edward), 1863-1940. Unloading horses using pulley system from the steamer DORA, ca. 1912. ca. 1912. Retrieved from the Digital Public Library of America, http://cdm16786.contentdm.oclc.org/cdm/ref/collection/thwaites/id/25. (Accessed November 19, 2018.)
APA citation style
Thwaites, John E. (John Edward), 1863-1940, (ca. 1912) Unloading horses using pulley system from the steamer DORA, ca. 1912. Retrieved from the Digital Public Library of America, http://cdm16786.contentdm.oclc.org/cdm/ref/collection/thwaites/id/25
MLA citation style
Thwaites, John E. (John Edward), 1863-1940. Retrieved from the Digital Public Library of America <http://cdm16786.contentdm.oclc.org/cdm/ref/collection/thwaites/id/25>.
Note: These citations are programmatically generated and may be incomplete.