MLA

Brady, Mathew B., approximately 1823-1896. Breve, Nannie. Box 37, folder 1838. 1849-circa 1956. https://collections.library.yale.edu/catalog/33109405.

APA, 6th edition

Brady, Mathew B., approximately 1823-1896. (["Box 37, folder 1838"])(1849-circa 1956)[Breve, Nannie]. https://collections.library.yale.edu/catalog/33109405.