Letter from [John Muir] to Helen [Muir Funk], 1909 Dec 3

Chicago citation style
John Muir. Letter from [John Muir] to Helen [Muir Funk], 1909 Dec 3. 1909 Dec 3. Retrieved from the Digital Public Library of America, http://ark.cdlib.org/ark:/13030/kt2j49r5x0. (Accessed December 11, 2018.)
APA citation style
John Muir, (1909 Dec 3) Letter from [John Muir] to Helen [Muir Funk], 1909 Dec 3. Retrieved from the Digital Public Library of America, http://ark.cdlib.org/ark:/13030/kt2j49r5x0
MLA citation style
John Muir. Retrieved from the Digital Public Library of America <http://ark.cdlib.org/ark:/13030/kt2j49r5x0>.
Note: These citations are programmatically generated and may be incomplete.