Sea stack on Ruby Beach, Olympic National Park, date unknown

Chicago citation style
Unknown. Sea stack on Ruby Beach, Olympic National Park, date unknown. Retrieved from the Digital Public Library of America, http://cdm16786.contentdm.oclc.org/cdm/ref/collection/nps/id/1550. (Accessed September 18, 2018.)
APA citation style
Unknown, Sea stack on Ruby Beach, Olympic National Park, date unknown. Retrieved from the Digital Public Library of America, http://cdm16786.contentdm.oclc.org/cdm/ref/collection/nps/id/1550
MLA citation style
Unknown. Retrieved from the Digital Public Library of America <http://cdm16786.contentdm.oclc.org/cdm/ref/collection/nps/id/1550>.
Note: These citations are programmatically generated and may be incomplete.