MLA

Richards, Lloyd, 1919-2006. By Ruth Fremson. Box 142, folder 1685. 1997. https://collections.library.yale.edu/catalog/16836374.

APA, 6th edition

Richards, Lloyd, 1919-2006. (["Box 142, folder 1685"])(1997)[By Ruth Fremson]. https://collections.library.yale.edu/catalog/16836374.