MLA

Williams, William Carlos, 1883-1963. Act 1, drafts, composite typescript and holograph with notes on prescription pad. Box 60, folder 1309. September - December 1949. https://collections.library.yale.edu/catalog/11870016.

APA, 6th edition

Williams, William Carlos, 1883-1963. (["Box 60, folder 1309"])(September - December 1949)[Act 1, drafts, composite typescript and holograph with notes on prescription pad]. https://collections.library.yale.edu/catalog/11870016.