"M" general
MLA
Asch, Sholem, 1880-1957. "M" general. Box 14, folder 164. 1932-43, n.d.. https://collections.library.yale.edu/catalog/32319741.
APA, 6th edition
Asch, Sholem, 1880-1957. (["Box 14, folder 164"])(1932-43, n.d.)["M" general]. https://collections.library.yale.edu/catalog/32319741.