MLA

De Palchi, Alfredo, 1926-. Ulrichs, Timm. Box 38. 1939-2003. https://collections.library.yale.edu/catalog/2017854.

APA, 6th edition

De Palchi, Alfredo, 1926-. (["Box 38"])(1939-2003)[Ulrichs, Timm]. https://collections.library.yale.edu/catalog/2017854.