MLA

Miłosz, Czesław, 1911-2004. Sito, Jerzy. Box 58, folder 802. 1955-1969. https://collections.library.yale.edu/catalog/17474989.

APA, 6th edition

Miłosz, Czesław, 1911-2004. (["Box 58, folder 802"])(1955-1969)[Sito, Jerzy]. https://collections.library.yale.edu/catalog/17474989.