MLA

Palmquist, Peter E. (1936-2003). Seely Brothers. Box 89, Box 90, Box 93. circa 1850-2003. https://collections.library.yale.edu/catalog/12246631.

APA, 6th edition

Palmquist, Peter E. (1936-2003). (["Box 89, Box 90, Box 93"])(circa 1850-2003)[Seely Brothers]. https://collections.library.yale.edu/catalog/12246631.