MLA

Gilman, Daniel C. (Daniel Coit), 1831-1908. Gilman, Emily. Box 3, folder 170. 1850-1853. https://collections.library.yale.edu/catalog/32522923.

APA, 6th edition

Gilman, Daniel C. (Daniel Coit), 1831-1908. (["Box 3, folder 170"])(1850-1853)[Gilman, Emily]. https://collections.library.yale.edu/catalog/32522923.