MLA

Miłosz, Czesław, 1911-2004. Gombrowicz, Witold. Box 21, folder 350. 1954-1969. https://collections.library.yale.edu/catalog/2007782.

APA, 6th edition

Miłosz, Czesław, 1911-2004. (["Box 21, folder 350"])(1954-1969)[Gombrowicz, Witold]. https://collections.library.yale.edu/catalog/2007782.