MLA

Nugent, Bruce, 1906-1987. Beam, Joseph. Box 3. 1985-1986. https://collections.library.yale.edu/catalog/16814000.

APA, 6th edition

Nugent, Bruce, 1906-1987. (["Box 3"])(1985-1986)[Beam, Joseph]. https://collections.library.yale.edu/catalog/16814000.