MLA

Wolff, Helen, 1906-1994. Milano, Paolo. Box 29, folder 882. 1962. https://collections.library.yale.edu/catalog/17269613.

APA, 6th edition

Wolff, Helen, 1906-1994. (["Box 29, folder 882"])(1962)[Milano, Paolo]. https://collections.library.yale.edu/catalog/17269613.