MLA

Palmquist, Peter E. (1936-2003). Hulbert, Neil K.. Box 71. circa 1850-2003. https://collections.library.yale.edu/catalog/12246531.

APA, 6th edition

Palmquist, Peter E. (1936-2003). (["Box 71"])(circa 1850-2003)[Hulbert, Neil K.]. https://collections.library.yale.edu/catalog/12246531.