MLA

Pound, Ezra, 1885-1972. Canto IV-Wind Poem: typescript. Box 70, folder 3114. n.d.. https://collections.library.yale.edu/catalog/16036133.

APA, 6th edition

Pound, Ezra, 1885-1972. (["Box 70, folder 3114"])(n.d.)[Canto IV-Wind Poem: typescript]. https://collections.library.yale.edu/catalog/16036133.