MLA

Palmquist, Peter E. (1936-2003). Wahlstrom, Amanda. Box 328, folder 2389. 1971-2003. https://collections.library.yale.edu/catalog/9998480.

APA, 6th edition

Palmquist, Peter E. (1936-2003). (["Box 328, folder 2389"])(1971-2003)[Wahlstrom, Amanda]. https://collections.library.yale.edu/catalog/9998480.