MLA

Wilder, Thornton, 1897-1975. Wilder at Deepwood Drive. Box 152, folder 3667. [ca. 1973]. https://collections.library.yale.edu/catalog/2037332.

APA, 6th edition

Wilder, Thornton, 1897-1975. (["Box 152, folder 3667"])([ca. 1973])[Wilder at Deepwood Drive]. https://collections.library.yale.edu/catalog/2037332.