MLA

Hagedorn, Hermann, 1882-1964. Damrosch, Walter. Box 3. 1936-1941. https://collections.library.yale.edu/catalog/17420190.

APA, 6th edition

Hagedorn, Hermann, 1882-1964. (["Box 3"])(1936-1941)[Damrosch, Walter]. https://collections.library.yale.edu/catalog/17420190.