Letter from John Muir to [Katharine] Hooker, 1911 Feb 21

Chicago citation style
John Muir. Letter from John Muir to [Katharine] Hooker, 1911 Feb 21. 1911 Feb 21. Retrieved from the Digital Public Library of America, http://ark.cdlib.org/ark:/13030/kt429033xg. (Accessed December 10, 2018.)
APA citation style
John Muir, (1911 Feb 21) Letter from John Muir to [Katharine] Hooker, 1911 Feb 21. Retrieved from the Digital Public Library of America, http://ark.cdlib.org/ark:/13030/kt429033xg
MLA citation style
John Muir. Retrieved from the Digital Public Library of America <http://ark.cdlib.org/ark:/13030/kt429033xg>.
Note: These citations are programmatically generated and may be incomplete.