MLA

Asch, Sholem, 1880-1957. "A Word to the Poles," typescript. Box 12, folder 133. n.d.. https://collections.library.yale.edu/catalog/32319680.

APA, 6th edition

Asch, Sholem, 1880-1957. (["Box 12, folder 133"])(n.d.)["A Word to the Poles," typescript]. https://collections.library.yale.edu/catalog/32319680.