MLA

Hansen, Bert, 1944-. "Mr. Tilden's Physical Condition. From a Democratic and from a Republican Point of View.". Box 8, folder 13. 1880 April 21. https://collections.library.yale.edu/catalog/32327062.

APA, 6th edition

Hansen, Bert, 1944-. (["Box 8, folder 13"])(1880 April 21)["Mr. Tilden's Physical Condition. From a Democratic and from a Republican Point of View."]. https://collections.library.yale.edu/catalog/32327062.