MLA

Wharton, Edith, 1862-1937. Dramatization by Margaret Ayers. Box 1, folder 17-20. n.d.. https://collections.library.yale.edu/catalog/16713602.

APA, 6th edition

Wharton, Edith, 1862-1937. (["Box 1, folder 17-20"])(n.d.)[Dramatization by Margaret Ayers]. https://collections.library.yale.edu/catalog/16713602.