MLA

Huntington, Ellsworth, 1876-1947. White stone (unidentified) 2:1. Box 4, item 2-1. 1947, undated. https://collections.library.yale.edu/catalog/32213352.

APA, 6th edition

Huntington, Ellsworth, 1876-1947. (["Box 4, item 2-1"])(1947, undated)[White stone (unidentified) 2:1]. https://collections.library.yale.edu/catalog/32213352.