Cantos XXXI-XLI: notes; autograph ms.
MLA
Pound, Ezra, 1885-1972. Cantos XXXI-XLI: notes; autograph ms.. Box 73, folder 3251. n.d.. https://collections.library.yale.edu/catalog/15824336.
APA, 6th edition
Pound, Ezra, 1885-1972. (["Box 73, folder 3251"])(n.d.)[Cantos XXXI-XLI: notes; autograph ms.]. https://collections.library.yale.edu/catalog/15824336.