MLA

Pound, Ezra, 1885-1972. Typescript. Box 104, folder 4362. [1908?]. https://collections.library.yale.edu/catalog/17122763.

APA, 6th edition

Pound, Ezra, 1885-1972. (["Box 104, folder 4362"])([1908?])[Typescript]. https://collections.library.yale.edu/catalog/17122763.