Holograph manuscript, corrected
MLA
Whitman, Walt, 1819-1892. Holograph manuscript, corrected. Box 3, folder 159. n.d.. https://collections.library.yale.edu/catalog/2001541.
APA, 6th edition
Whitman, Walt, 1819-1892. (["Box 3, folder 159"])(n.d.)[Holograph manuscript, corrected]. https://collections.library.yale.edu/catalog/2001541.