MLA

Pound, Ezra, 1885-1972. Cerio ["Le fiamme nare"]: typescript. Box 82, folder 3608. n.d.. https://collections.library.yale.edu/catalog/17122701.

APA, 6th edition

Pound, Ezra, 1885-1972. (["Box 82, folder 3608"])(n.d.)[Cerio ["Le fiamme nare"]: typescript]. https://collections.library.yale.edu/catalog/17122701.