MLA

Wharton, Edith, 1862-1937. James, William. Box 27, folder 834. 1910. https://collections.library.yale.edu/catalog/17111153.

APA, 6th edition

Wharton, Edith, 1862-1937. (["Box 27, folder 834"])(1910)[James, William]. https://collections.library.yale.edu/catalog/17111153.