[G. F. E. Pearsall?]
MLA
Whitman, Walt, 1819-1892. [G. F. E. Pearsall?]. Box 4, folder 177. [1873]. https://collections.library.yale.edu/catalog/2053808.
APA, 6th edition
Whitman, Walt, 1819-1892. (["Box 4, folder 177"])([1873])[[G. F. E. Pearsall?]]. https://collections.library.yale.edu/catalog/2053808.