MLA

Whitman, Walt, 1819-1892. Eyeglasses. Box 17, folder 271. n.d.. https://collections.library.yale.edu/catalog/2012037.

APA, 6th edition

Whitman, Walt, 1819-1892. (["Box 17, folder 271"])(n.d.)[Eyeglasses]. https://collections.library.yale.edu/catalog/2012037.