MLA

Wharton, Edith, 1862-1937. Outline. Box 1, folder 1. n.d.. https://collections.library.yale.edu/catalog/2001864.

APA, 6th edition

Wharton, Edith, 1862-1937. (["Box 1, folder 1"])(n.d.)[Outline]. https://collections.library.yale.edu/catalog/2001864.