Letter from M[ay] F. Benton to John Muir, [ca. 1902]

Chicago citation style
M[ay] F. Benton. Letter from M[ay] F. Benton to John Muir, [ca. 1902]. [ca. 1902]. Retrieved from the Digital Public Library of America, http://ark.cdlib.org/ark:/13030/kt2h4nf0jn. (Accessed December 10, 2018.)
APA citation style
M[ay] F. Benton, ([ca. 1902]) Letter from M[ay] F. Benton to John Muir, [ca. 1902]. Retrieved from the Digital Public Library of America, http://ark.cdlib.org/ark:/13030/kt2h4nf0jn
MLA citation style
M[ay] F. Benton. Retrieved from the Digital Public Library of America <http://ark.cdlib.org/ark:/13030/kt2h4nf0jn>.
Note: These citations are programmatically generated and may be incomplete.