Early script drafts
MLA
Richards, Lloyd, 1919-2006. Early script drafts. Box 47, folder 470-472. 1989-1990. https://collections.library.yale.edu/catalog/16238340.
APA, 6th edition
Richards, Lloyd, 1919-2006. (["Box 47, folder 470-472"])(1989-1990)[Early script drafts]. https://collections.library.yale.edu/catalog/16238340.