MLA

Martinelli, Sheri (1918-1996). Unsorted. Box 12. 1964-1981. https://collections.library.yale.edu/catalog/17181257.

APA, 6th edition

Martinelli, Sheri (1918-1996). (["Box 12"])(1964-1981)[Unsorted]. https://collections.library.yale.edu/catalog/17181257.