MLA

Pound, Ezra, 1885-1972. Typescript. Box 123, folder 5038. n.d.. https://collections.library.yale.edu/catalog/2042163.

APA, 6th edition

Pound, Ezra, 1885-1972. (["Box 123, folder 5038"])(n.d.)[Typescript]. https://collections.library.yale.edu/catalog/2042163.