MLA

H. D. (Hilda Doolittle), 1886-1961. Autobiographical notes. Box 47, folder 1181-82. n.d.. https://collections.library.yale.edu/catalog/10189523.

APA, 6th edition

H. D. (Hilda Doolittle), 1886-1961. (["Box 47, folder 1181-82"])(n.d.)[Autobiographical notes]. https://collections.library.yale.edu/catalog/10189523.