MLA

Natural Color Cards Co. (Ridgefield Park, New Jersey). Memorial Unit, Grace-New Haven Community Hospital. New Haven, Connecticut. box 1, folder 8. circa 1950-1959. https://collections.library.yale.edu/catalog/15789477.

APA, 6th edition

Natural Color Cards Co. (Ridgefield Park, New Jersey). (["box 1, folder 8"])(circa 1950-1959)[Memorial Unit, Grace-New Haven Community Hospital. New Haven, Connecticut]. https://collections.library.yale.edu/catalog/15789477.