MLA

H. D. (Hilda Doolittle), 1886-1961. Typescript. Box 38, folder 999. 1941. https://collections.library.yale.edu/catalog/17064272.

APA, 6th edition

H. D. (Hilda Doolittle), 1886-1961. (["Box 38, folder 999"])(1941)[Typescript]. https://collections.library.yale.edu/catalog/17064272.