MLA

Argus Book Shop (Chicago, Ill.). Hughes, Langston. Box 7, folder 223. 1940-1944. https://collections.library.yale.edu/catalog/17411913.

APA, 6th edition

Argus Book Shop (Chicago, Ill.). (["Box 7, folder 223"])(1940-1944)[Hughes, Langston]. https://collections.library.yale.edu/catalog/17411913.