MLA

Hansen, Bert, 1944-. "Tariff Reform Tonic. Uncle Sam Has only Had One Sip, but it has Already Done him Good.". Box 10, folder 21. 1894 October 24. https://collections.library.yale.edu/catalog/32331617.

APA, 6th edition

Hansen, Bert, 1944-. (["Box 10, folder 21"])(1894 October 24)["Tariff Reform Tonic. Uncle Sam Has only Had One Sip, but it has Already Done him Good."]. https://collections.library.yale.edu/catalog/32331617.