MLA

H. D. (Hilda Doolittle), 1886-1961. "Leuke". Box 32, folder 840. n.d.. https://collections.library.yale.edu/catalog/17064219.

APA, 6th edition

H. D. (Hilda Doolittle), 1886-1961. (["Box 32, folder 840"])(n.d.)["Leuke"]. https://collections.library.yale.edu/catalog/17064219.