Letter
MLA
Eliot, George, 1819-1880. Letter. Box 7. [1859] Jul 3. https://collections.library.yale.edu/catalog/10001183.
APA, 6th edition
Eliot, George, 1819-1880. (["Box 7"])([1859] Jul 3)[Letter]. https://collections.library.yale.edu/catalog/10001183.