Typed version, corrected in unidentified hand
MLA
Thoreau, Henry David, 1817-1862. Typed version, corrected in unidentified hand. Box 1, folder 12. n.d.. https://collections.library.yale.edu/catalog/2056834.
APA, 6th edition
Thoreau, Henry David, 1817-1862. (["Box 1, folder 12"])(n.d.)[Typed version, corrected in unidentified hand]. https://collections.library.yale.edu/catalog/2056834.