MLA

Pound, Ezra, 1885-1972. Chinese Poetry. Mori: typescripts. Box 99, folder 4223. n.d.. https://collections.library.yale.edu/catalog/17122742.

APA, 6th edition

Pound, Ezra, 1885-1972. (["Box 99, folder 4223"])(n.d.)[Chinese Poetry. Mori: typescripts]. https://collections.library.yale.edu/catalog/17122742.