Blue Glacier and Mount Olympus, Olympic National Park, ca. 1990

Chicago citation style
Gurling, Mike. Blue Glacier and Mount Olympus, Olympic National Park, ca. 1990. ca. 1990. Retrieved from the Digital Public Library of America, http://cdm16786.contentdm.oclc.org/cdm/ref/collection/nps/id/1500. (Accessed June 21, 2018.)
APA citation style
Gurling, Mike, (ca. 1990) Blue Glacier and Mount Olympus, Olympic National Park, ca. 1990. Retrieved from the Digital Public Library of America, http://cdm16786.contentdm.oclc.org/cdm/ref/collection/nps/id/1500
MLA citation style
Gurling, Mike. Retrieved from the Digital Public Library of America <http://cdm16786.contentdm.oclc.org/cdm/ref/collection/nps/id/1500>.
Note: These citations are programmatically generated and may be incomplete.