MLA

Howe, Susan, 1937-. Bernstein, Charles. Box 1. 2001-2002. https://collections.library.yale.edu/catalog/17165220.

APA, 6th edition

Howe, Susan, 1937-. (["Box 1"])(2001-2002)[Bernstein, Charles]. https://collections.library.yale.edu/catalog/17165220.