MLA

Williams, William Carlos, 1883-1963. Notes on prescription pad, holograph notes; synopsis and partial drafts, typescript. Box 58, folder 1294. 1934, undated. https://collections.library.yale.edu/catalog/11870014.

APA, 6th edition

Williams, William Carlos, 1883-1963. (["Box 58, folder 1294"])(1934, undated)[Notes on prescription pad, holograph notes; synopsis and partial drafts, typescript]. https://collections.library.yale.edu/catalog/11870014.