MLA

Palmquist, Peter E. (1936-2003). 1968-1971. Box 17. circa 1850-2003. https://collections.library.yale.edu/catalog/12246786.

APA, 6th edition

Palmquist, Peter E. (1936-2003). (["Box 17"])(circa 1850-2003)[1968-1971]. https://collections.library.yale.edu/catalog/12246786.