MLA

Draper, Muriel, 1886-1952. Gordon, Taylor. Box 16, folder 546. n.d.. https://collections.library.yale.edu/catalog/2021106.

APA, 6th edition

Draper, Muriel, 1886-1952. (["Box 16, folder 546"])(n.d.)[Gordon, Taylor]. https://collections.library.yale.edu/catalog/2021106.