"Sets," drawings, holograph
MLA
O'Neill, Eugene, 1888-1953. "Sets," drawings, holograph. Box 44, folder 947. n.d.. https://collections.library.yale.edu/catalog/17060797.
APA, 6th edition
O'Neill, Eugene, 1888-1953. (["Box 44, folder 947"])(n.d.)["Sets," drawings, holograph]. https://collections.library.yale.edu/catalog/17060797.