MLA

Pound, Ezra, 1885-1972. [Anthology of World Poetry: Notes for Contents]: typescript, original, and autograph manuscript 11 numb.l.. Box 67, folder 2955. n.d.. https://collections.library.yale.edu/catalog/2041577.

APA, 6th edition

Pound, Ezra, 1885-1972. (["Box 67, folder 2955"])(n.d.)[[Anthology of World Poetry: Notes for Contents]: typescript, original, and autograph manuscript 11 numb.l.]. https://collections.library.yale.edu/catalog/2041577.