MLA

Pound, Ezra, 1885-1972. Carnevali, Emanuel: [Poems]: typescripts. Box 143, folder 6280. n.d.. https://collections.library.yale.edu/catalog/10279329.

APA, 6th edition

Pound, Ezra, 1885-1972. (["Box 143, folder 6280"])(n.d.)[Carnevali, Emanuel: [Poems]: typescripts]. https://collections.library.yale.edu/catalog/10279329.