MLA

Palmquist, Peter E. (1936-2003). Anderson, Hilda. Box 218, folder 133. 1971-2003. https://collections.library.yale.edu/catalog/9998489.

APA, 6th edition

Palmquist, Peter E. (1936-2003). (["Box 218, folder 133"])(1971-2003)[Anderson, Hilda]. https://collections.library.yale.edu/catalog/9998489.