Porcupine Gold Mining Company flume under construction showing unfinshed buildings in the background, as seen from on top of the sills, Porcupine, Alaska, ca. 1907

Chicago citation style
Draper, Herbert Horace, 1855-1913. Porcupine Gold Mining Company flume under construction showing unfinshed buildings in the background, as seen from on top of the sills, Porcupine, Alaska, ca. 1907. ca. 1907. Retrieved from the Digital Public Library of America, http://cdm16786.contentdm.oclc.org/cdm/ref/collection/alaskawcanada/id/2333. (Accessed July 20, 2018.)
APA citation style
Draper, Herbert Horace, 1855-1913, (ca. 1907) Porcupine Gold Mining Company flume under construction showing unfinshed buildings in the background, as seen from on top of the sills, Porcupine, Alaska, ca. 1907. Retrieved from the Digital Public Library of America, http://cdm16786.contentdm.oclc.org/cdm/ref/collection/alaskawcanada/id/2333
MLA citation style
Draper, Herbert Horace, 1855-1913. Retrieved from the Digital Public Library of America <http://cdm16786.contentdm.oclc.org/cdm/ref/collection/alaskawcanada/id/2333>.
Note: These citations are programmatically generated and may be incomplete.