MLA

Salsbury, Nathan, 1846-1902. Miscellaneous papers. Box 1, folder 34. 1886, 1896, n.d.. https://collections.library.yale.edu/catalog/17426147.

APA, 6th edition

Salsbury, Nathan, 1846-1902. (["Box 1, folder 34"])(1886, 1896, n.d.)[Miscellaneous papers]. https://collections.library.yale.edu/catalog/17426147.