MLA

H. D. (Hilda Doolittle), 1886-1961. Bryher. Box 6, folder 168-200. 1948-54. https://collections.library.yale.edu/catalog/17064188.

APA, 6th edition

H. D. (Hilda Doolittle), 1886-1961. (["Box 6, folder 168-200"])(1948-54)[Bryher]. https://collections.library.yale.edu/catalog/17064188.