MLA

Serge, Victor, 1890-1947. Typescript carbon. Box 4, folder 204. 1946 spring. https://collections.library.yale.edu/catalog/33075191.

APA, 6th edition

Serge, Victor, 1890-1947. (["Box 4, folder 204"])(1946 spring)[Typescript carbon]. https://collections.library.yale.edu/catalog/33075191.