MLA

O'Neill, Eugene, 1888-1953. Film treatment, typescript carbon. Box 12, folder 211. [circa 1927]. https://collections.library.yale.edu/catalog/17155207.

APA, 6th edition

O'Neill, Eugene, 1888-1953. (["Box 12, folder 211"])([circa 1927])[Film treatment, typescript carbon]. https://collections.library.yale.edu/catalog/17155207.