Umbrella Rock, Lookout Mountain, Chattanooga, Tenn. postcard, undated

Chicago citation style
Umbrella Rock, Lookout Mountain, Chattanooga, Tenn. postcard, undated. 1907. Retrieved from the Digital Public Library of America, http://cdm16877.contentdm.oclc.org/cdm/ref/collection/p16877coll12/id/449. (Accessed September 18, 2019.)
APA citation style
(1907) Umbrella Rock, Lookout Mountain, Chattanooga, Tenn. postcard, undated. Retrieved from the Digital Public Library of America, http://cdm16877.contentdm.oclc.org/cdm/ref/collection/p16877coll12/id/449
MLA citation style
Retrieved from the Digital Public Library of America <http://cdm16877.contentdm.oclc.org/cdm/ref/collection/p16877coll12/id/449>.
Note: These citations are programmatically generated and may be incomplete.