MLA

Pound, Ezra, 1885-1972. [second version?]: typescript. Box 104, folder 4382. [1936?]. https://collections.library.yale.edu/catalog/11689687.

APA, 6th edition

Pound, Ezra, 1885-1972. (["Box 104, folder 4382"])([1936?])[[second version?]: typescript]. https://collections.library.yale.edu/catalog/11689687.