MLA

Miłosz, Czesław, 1911-2004. "Kongres poetów," draft, holograph, corrected. Box 114, folder 1642. 1952 or 1953. https://collections.library.yale.edu/catalog/10086153.

APA, 6th edition

Miłosz, Czesław, 1911-2004. (["Box 114, folder 1642"])(1952 or 1953)["Kongres poetów," draft, holograph, corrected]. https://collections.library.yale.edu/catalog/10086153.