Letter from John Muir to [Robert Underwood Johnson ?], [ca 1895]

Chicago citation style
John Muir. Letter from John Muir to [Robert Underwood Johnson ?], [ca 1895]. [ca 1895]. Retrieved from the Digital Public Library of America, http://ark.cdlib.org/ark:/13030/kt429033mt. (Accessed December 14, 2018.)
APA citation style
John Muir, ([ca 1895]) Letter from John Muir to [Robert Underwood Johnson ?], [ca 1895]. Retrieved from the Digital Public Library of America, http://ark.cdlib.org/ark:/13030/kt429033mt
MLA citation style
John Muir. Retrieved from the Digital Public Library of America <http://ark.cdlib.org/ark:/13030/kt429033mt>.
Note: These citations are programmatically generated and may be incomplete.