Letter from John Muir to [Robert Underwood] Johnson, 1908 Jun 2

Chicago citation style
John Muir. Letter from John Muir to [Robert Underwood] Johnson, 1908 Jun 2. 1908 Jun 2. Retrieved from the Digital Public Library of America, http://ark.cdlib.org/ark:/13030/kt2j49r5wg. (Accessed December 15, 2018.)
APA citation style
John Muir, (1908 Jun 2) Letter from John Muir to [Robert Underwood] Johnson, 1908 Jun 2. Retrieved from the Digital Public Library of America, http://ark.cdlib.org/ark:/13030/kt2j49r5wg
MLA citation style
John Muir. Retrieved from the Digital Public Library of America <http://ark.cdlib.org/ark:/13030/kt2j49r5wg>.
Note: These citations are programmatically generated and may be incomplete.