MLA

Benét, William Rose, 1886-1950. Drafts, biographical sketch, autograph manuscript, corrected, and typescript carbon. Box 77, folder 2581. 1920–1921. https://collections.library.yale.edu/catalog/10517490.

APA, 6th edition

Benét, William Rose, 1886-1950. (["Box 77, folder 2581"])(1920–1921)[Drafts, biographical sketch, autograph manuscript, corrected, and typescript carbon]. https://collections.library.yale.edu/catalog/10517490.