Letter from Louie [Strentzel Muir] to John Muir, [1891 Dec 1]

Chicago citation style
Louie [Strentzel Muir]. Letter from Louie [Strentzel Muir] to John Muir, [1891 Dec 1]. [1891 Dec 1]. Retrieved from the Digital Public Library of America, http://ark.cdlib.org/ark:/13030/kt2h4nf0f3. (Accessed December 17, 2018.)
APA citation style
Louie [Strentzel Muir], ([1891 Dec 1]) Letter from Louie [Strentzel Muir] to John Muir, [1891 Dec 1]. Retrieved from the Digital Public Library of America, http://ark.cdlib.org/ark:/13030/kt2h4nf0f3
MLA citation style
Louie [Strentzel Muir]. Retrieved from the Digital Public Library of America <http://ark.cdlib.org/ark:/13030/kt2h4nf0f3>.
Note: These citations are programmatically generated and may be incomplete.