MLA

Wharton, Edith, 1862-1937. Notebook. Box 14, folder 389. n.d.. https://collections.library.yale.edu/catalog/17111099.

APA, 6th edition

Wharton, Edith, 1862-1937. (["Box 14, folder 389"])(n.d.)[Notebook]. https://collections.library.yale.edu/catalog/17111099.