MLA

Pound, Ezra, 1885-1972. "Avere e non avere": typescript. Box 145, folder 6370. n.d.. https://collections.library.yale.edu/catalog/17122876.

APA, 6th edition

Pound, Ezra, 1885-1972. (["Box 145, folder 6370"])(n.d.)["Avere e non avere": typescript]. https://collections.library.yale.edu/catalog/17122876.