MLA

Pound, Ezra, 1885-1972. Il grano: typescript. Box 104, folder 4378. n.d.. https://collections.library.yale.edu/catalog/32161248.

APA, 6th edition

Pound, Ezra, 1885-1972. (["Box 104, folder 4378"])(n.d.)[Il grano: typescript]. https://collections.library.yale.edu/catalog/32161248.