MLA

Pound, Ezra, 1885-1972. Momigliano, Attilio. Box 34, folder 1449. 1932. https://collections.library.yale.edu/catalog/12152769.

APA, 6th edition

Pound, Ezra, 1885-1972. (["Box 34, folder 1449"])(1932)[Momigliano, Attilio]. https://collections.library.yale.edu/catalog/12152769.