MLA

Steinberg, Saul, 1914-1999. Bologna Via Roma. Box 78, folder 1570. undated. https://collections.library.yale.edu/catalog/32457217.

APA, 6th edition

Steinberg, Saul, 1914-1999. (["Box 78, folder 1570"])(undated)[Bologna Via Roma]. https://collections.library.yale.edu/catalog/32457217.