MLA

Miłosz, Czesław, 1911-2004. Witkiewiczowa, Jadwiga. Box 3, folder 80. 1947-1948. https://collections.library.yale.edu/catalog/10080261.

APA, 6th edition

Miłosz, Czesław, 1911-2004. (["Box 3, folder 80"])(1947-1948)[Witkiewiczowa, Jadwiga]. https://collections.library.yale.edu/catalog/10080261.