MLA

H. D. (Hilda Doolittle), 1886-1961. H.D.. Box 53, folder 1332-54. 1887-1929. https://collections.library.yale.edu/catalog/32426769.

APA, 6th edition

H. D. (Hilda Doolittle), 1886-1961. (["Box 53, folder 1332-54"])(1887-1929)[H.D.]. https://collections.library.yale.edu/catalog/32426769.