MLA

Palmquist, Peter E. (1936-2003). Flaglor, Amasa Plummer. Box 61, Box 62. circa 1850-2003. https://collections.library.yale.edu/catalog/12246524.

APA, 6th edition

Palmquist, Peter E. (1936-2003). (["Box 61, Box 62"])(circa 1850-2003)[Flaglor, Amasa Plummer]. https://collections.library.yale.edu/catalog/12246524.