MLA

Palmquist, Peter E. (1936-2003). Swanlund, David Harper. Box 100. circa 1850-2003. https://collections.library.yale.edu/catalog/12246656.

APA, 6th edition

Palmquist, Peter E. (1936-2003). (["Box 100"])(circa 1850-2003)[Swanlund, David Harper]. https://collections.library.yale.edu/catalog/12246656.