MLA

Gilman, Daniel C. (Daniel Coit), 1831-1908. Gilman, Hattie. Box 3, folder 171. 1848. https://collections.library.yale.edu/catalog/32522952.

APA, 6th edition

Gilman, Daniel C. (Daniel Coit), 1831-1908. (["Box 3, folder 171"])(1848)[Gilman, Hattie]. https://collections.library.yale.edu/catalog/32522952.