MLA

Pound, Ezra, 1885-1972. "Moth": typescript. Box 88, folder 3772. n.d.. https://collections.library.yale.edu/catalog/17122709.

APA, 6th edition

Pound, Ezra, 1885-1972. (["Box 88, folder 3772"])(n.d.)["Moth": typescript]. https://collections.library.yale.edu/catalog/17122709.