Cite

"The Lesson"

MLA

Williams, William Carlos, 1883-1963. "The Lesson". Box 51, folder 1200. undated. https://collections.library.yale.edu/catalog/17049597.

APA, 6th edition

Williams, William Carlos, 1883-1963. (["Box 51, folder 1200"])(undated)["The Lesson"]. https://collections.library.yale.edu/catalog/17049597.