Autograph ms.
MLA
Pound, Ezra, 1885-1972. Autograph ms.. Box 70, folder 3103. n.d.. https://collections.library.yale.edu/catalog/16032481.
APA, 6th edition
Pound, Ezra, 1885-1972. (["Box 70, folder 3103"])(n.d.)[Autograph ms.]. https://collections.library.yale.edu/catalog/16032481.