MLA

Whitman, Walt, 1819-1892. Rice, Allen Thorndike. Box 2, folder 85. 1881 Jan 21. https://collections.library.yale.edu/catalog/2053719.

APA, 6th edition

Whitman, Walt, 1819-1892. (["Box 2, folder 85"])(1881 Jan 21)[Rice, Allen Thorndike]. https://collections.library.yale.edu/catalog/2053719.