MLA

Richards, Lloyd, 1919-2006. British Broadcasting Company. Box 131, folder 1492. 1985. https://collections.library.yale.edu/catalog/17365038.

APA, 6th edition

Richards, Lloyd, 1919-2006. (["Box 131, folder 1492"])(1985)[British Broadcasting Company]. https://collections.library.yale.edu/catalog/17365038.