MLA

Cooper, James Fenimore, 1789-1851. Hill, William. Box 13, folder 361. 1853. https://collections.library.yale.edu/catalog/17073669.

APA, 6th edition

Cooper, James Fenimore, 1789-1851. (["Box 13, folder 361"])(1853)[Hill, William]. https://collections.library.yale.edu/catalog/17073669.