MLA

H. D. (Hilda Doolittle), 1886-1961. Part I, first draft, typescript, carbon, corrected. Box 43, folder 1116. 1918-20. https://collections.library.yale.edu/catalog/17064291.

APA, 6th edition

H. D. (Hilda Doolittle), 1886-1961. (["Box 43, folder 1116"])(1918-20)[Part I, first draft, typescript, carbon, corrected]. https://collections.library.yale.edu/catalog/17064291.