MLA

Pound, Ezra, 1885-1972. Jefferson E/O Mussolini: typescript. Box 109, folder 4578-4581. [1944]. https://collections.library.yale.edu/catalog/2042160.

APA, 6th edition

Pound, Ezra, 1885-1972. (["Box 109, folder 4578-4581"])([1944])[Jefferson E/O Mussolini: typescript]. https://collections.library.yale.edu/catalog/2042160.