MLA

Wharton, Edith, 1862-1937. Jones, Mary Cadwalader. Box 28, folder 836-62. 1903-35. https://collections.library.yale.edu/catalog/2057248.

APA, 6th edition

Wharton, Edith, 1862-1937. (["Box 28, folder 836-62"])(1903-35)[Jones, Mary Cadwalader]. https://collections.library.yale.edu/catalog/2057248.