MLA

Pound, Ezra, 1885-1972. Canto LXXIV-LXXXII [incomplete]: typescript. Box 76, folder 3393. n.d.. https://collections.library.yale.edu/catalog/17122692.

APA, 6th edition

Pound, Ezra, 1885-1972. (["Box 76, folder 3393"])(n.d.)[Canto LXXIV-LXXXII [incomplete]: typescript]. https://collections.library.yale.edu/catalog/17122692.