MLA

Wharton, Edith, 1862-1937. Lodge, George Cabot. Box 29, folder 870. [1905]. https://collections.library.yale.edu/catalog/32182670.

APA, 6th edition

Wharton, Edith, 1862-1937. (["Box 29, folder 870"])([1905])[Lodge, George Cabot]. https://collections.library.yale.edu/catalog/32182670.