MLA

H. D. (Hilda Doolittle), 1886-1961. "The Powers of Ancient Egypt," notes. Box 45, folder 1141. n.d.. https://collections.library.yale.edu/catalog/17064298.

APA, 6th edition

H. D. (Hilda Doolittle), 1886-1961. (["Box 45, folder 1141"])(n.d.)["The Powers of Ancient Egypt," notes]. https://collections.library.yale.edu/catalog/17064298.