MLA

Broch, Hermann, 1886-1951. Kohn, Hans. Box 8, folder 208. 1948. https://collections.library.yale.edu/catalog/17267996.

APA, 6th edition

Broch, Hermann, 1886-1951. (["Box 8, folder 208"])(1948)[Kohn, Hans]. https://collections.library.yale.edu/catalog/17267996.