Pillow lava on Hurricane Ridge, Olympic National Park, date unknown

Chicago citation style
Pillow lava on Hurricane Ridge, Olympic National Park, date unknown. Retrieved from the Digital Public Library of America, http://cdm16786.contentdm.oclc.org/cdm/ref/collection/nps/id/1625. (Accessed October 21, 2018.)
APA citation style
Pillow lava on Hurricane Ridge, Olympic National Park, date unknown. Retrieved from the Digital Public Library of America, http://cdm16786.contentdm.oclc.org/cdm/ref/collection/nps/id/1625
MLA citation style
Retrieved from the Digital Public Library of America <http://cdm16786.contentdm.oclc.org/cdm/ref/collection/nps/id/1625>.
Note: These citations are programmatically generated and may be incomplete.