People on a beach, probably in Olympic National Park, date unknown

Chicago citation style
Unknown. People on a beach, probably in Olympic National Park, date unknown. Retrieved from the Digital Public Library of America, http://cdm16786.contentdm.oclc.org/cdm/ref/collection/nps/id/1875. (Accessed June 23, 2018.)
APA citation style
Unknown, People on a beach, probably in Olympic National Park, date unknown. Retrieved from the Digital Public Library of America, http://cdm16786.contentdm.oclc.org/cdm/ref/collection/nps/id/1875
MLA citation style
Unknown. Retrieved from the Digital Public Library of America <http://cdm16786.contentdm.oclc.org/cdm/ref/collection/nps/id/1875>.
Note: These citations are programmatically generated and may be incomplete.