MLA

H. D. (Hilda Doolittle), 1886-1961. Moore, Marianne. Box 12, folder 435-37. 1921-60. https://collections.library.yale.edu/catalog/17064197.

APA, 6th edition

H. D. (Hilda Doolittle), 1886-1961. (["Box 12, folder 435-37"])(1921-60)[Moore, Marianne]. https://collections.library.yale.edu/catalog/17064197.