Heart Lake, Olympic National Park, date unknown

Chicago citation style
H.H.. Heart Lake, Olympic National Park, date unknown. Retrieved from the Digital Public Library of America, http://cdm16786.contentdm.oclc.org/cdm/ref/collection/nps/id/726. (Accessed October 22, 2018.)
APA citation style
H.H., Heart Lake, Olympic National Park, date unknown. Retrieved from the Digital Public Library of America, http://cdm16786.contentdm.oclc.org/cdm/ref/collection/nps/id/726
MLA citation style
H.H.. Retrieved from the Digital Public Library of America <http://cdm16786.contentdm.oclc.org/cdm/ref/collection/nps/id/726>.
Note: These citations are programmatically generated and may be incomplete.