MLA

Wharton, Edith, 1862-1937. "Princess Bluey of Blue Diamond Hall": holograph manuscript. Box 18, folder 543. n.d.. https://collections.library.yale.edu/catalog/10577041.

APA, 6th edition

Wharton, Edith, 1862-1937. (["Box 18, folder 543"])(n.d.)["Princess Bluey of Blue Diamond Hall": holograph manuscript]. https://collections.library.yale.edu/catalog/10577041.