MLA

Broch, Hermann, 1886-1951. Arendt, Hannah. Box 1, folder 9. 1946-51. https://collections.library.yale.edu/catalog/2021509.

APA, 6th edition

Broch, Hermann, 1886-1951. (["Box 1, folder 9"])(1946-51)[Arendt, Hannah]. https://collections.library.yale.edu/catalog/2021509.