MLA

Salsbury, Nathan, 1846-1902. Correspondence. Box 1, folder 8. 1894-95. https://collections.library.yale.edu/catalog/17060007.

APA, 6th edition

Salsbury, Nathan, 1846-1902. (["Box 1, folder 8"])(1894-95)[Correspondence]. https://collections.library.yale.edu/catalog/17060007.