MLA

Miłosz, Czesław, 1911-2004. Święcicki, Ignacy. Box 59, folder 828-829. 1952-2000. https://collections.library.yale.edu/catalog/10082370.

APA, 6th edition

Miłosz, Czesław, 1911-2004. (["Box 59, folder 828-829"])(1952-2000)[Święcicki, Ignacy]. https://collections.library.yale.edu/catalog/10082370.