MLA

Palmquist, Peter E. (1936-2003). Kilburn, Kenneth Clyde. Box 78. circa 1850-2003. https://collections.library.yale.edu/catalog/12246554.

APA, 6th edition

Palmquist, Peter E. (1936-2003). (["Box 78"])(circa 1850-2003)[Kilburn, Kenneth Clyde]. https://collections.library.yale.edu/catalog/12246554.