MLA

Whorf, Benjamin Lee, 1897-1941. Articles about Whorf. Box 15, folder 1 | reel 5U. 1933-1957, n.d. https://collections.library.yale.edu/catalog/10009314.

APA, 6th edition

Whorf, Benjamin Lee, 1897-1941. (["Box 15, folder 1 | reel 5U"])(1933-1957, n.d)[Articles about Whorf]. https://collections.library.yale.edu/catalog/10009314.