"Sutzkever"
MLA
Stewart, Donald Ogden, 1894-1980. "Sutzkever". Box 26. 1943; undated. https://collections.library.yale.edu/catalog/17436008.
APA, 6th edition
Stewart, Donald Ogden, 1894-1980. (["Box 26"])(1943; undated)["Sutzkever"]. https://collections.library.yale.edu/catalog/17436008.