MLA

Miłosz, Czesław, 1911-2004. Wilder, Thornton. Box 69, folder 945. 1951-1970. https://collections.library.yale.edu/catalog/10034607.

APA, 6th edition

Miłosz, Czesław, 1911-2004. (["Box 69, folder 945"])(1951-1970)[Wilder, Thornton]. https://collections.library.yale.edu/catalog/10034607.