Cite

"Poetry of the Future," holograph fragment, corrected

MLA

Whitman, Walt, 1819-1892. "Poetry of the Future," holograph fragment, corrected. Box 3, folder 113. n.d.. https://collections.library.yale.edu/catalog/2007248.

APA, 6th edition

Whitman, Walt, 1819-1892. (["Box 3, folder 113"])(n.d.)["Poetry of the Future," holograph fragment, corrected]. https://collections.library.yale.edu/catalog/2007248.