MLA

Miłosz, Czesław, 1911-2004. Sutzkever, Abraham. Box 59, folder 820. 1980-1981. https://collections.library.yale.edu/catalog/10869138.

APA, 6th edition

Miłosz, Czesław, 1911-2004. (["Box 59, folder 820"])(1980-1981)[Sutzkever, Abraham]. https://collections.library.yale.edu/catalog/10869138.