MLA

Bontemps, Arna, 1902-1973. Typescript carbon. Box 2, folder 37. n.d.. https://collections.library.yale.edu/catalog/31913721.

APA, 6th edition

Bontemps, Arna, 1902-1973. (["Box 2, folder 37"])(n.d.)[Typescript carbon]. https://collections.library.yale.edu/catalog/31913721.