MLA

Bryher, 1894-1983. Typescript, carbon, corrected. Box 89, folder 3303. n.d.. https://collections.library.yale.edu/catalog/17290859.

APA, 6th edition

Bryher, 1894-1983. (["Box 89, folder 3303"])(n.d.)[Typescript, carbon, corrected]. https://collections.library.yale.edu/catalog/17290859.