MLA

Harold Hahn Company (New Haven, Connecticut). Institute of Human Relations and the Sterling Hall of Medicine, Yale University. New Haven, Connecticut. box 1, folder 8. circa 1932. https://collections.library.yale.edu/catalog/15789372.

APA, 6th edition

Harold Hahn Company (New Haven, Connecticut). (["box 1, folder 8"])(circa 1932)[Institute of Human Relations and the Sterling Hall of Medicine, Yale University. New Haven, Connecticut]. https://collections.library.yale.edu/catalog/15789372.