MLA

H. D. (Hilda Doolittle), 1886-1961. Patmore, Brigit. Box 13, folder 446-50. 1922-30. https://collections.library.yale.edu/catalog/17064198.

APA, 6th edition

H. D. (Hilda Doolittle), 1886-1961. (["Box 13, folder 446-50"])(1922-30)[Patmore, Brigit]. https://collections.library.yale.edu/catalog/17064198.