Rock cairns with posts and markers

Chicago citation style
Rock cairns with posts and markers. ca. 1917. Retrieved from the Digital Public Library of America, https://library.ucsd.edu/dc/object/bb12315296. (Accessed December 16, 2018.)
APA citation style
(ca. 1917) Rock cairns with posts and markers. Retrieved from the Digital Public Library of America, https://library.ucsd.edu/dc/object/bb12315296
MLA citation style
Retrieved from the Digital Public Library of America <https://library.ucsd.edu/dc/object/bb12315296>.
Note: These citations are programmatically generated and may be incomplete.