MLA

Pound, Ezra, 1885-1972. Manuscript notes. Box 70, folder 3143. [1923?]. https://collections.library.yale.edu/catalog/16036225.

APA, 6th edition

Pound, Ezra, 1885-1972. (["Box 70, folder 3143"])([1923?])[Manuscript notes]. https://collections.library.yale.edu/catalog/16036225.