MLA

Davis, Andrew Jackson, 1826-1910. 1880. Box 1, folder 19. 1848-1929. https://collections.library.yale.edu/catalog/32528678.

APA, 6th edition

Davis, Andrew Jackson, 1826-1910. (["Box 1, folder 19"])(1848-1929)[1880]. https://collections.library.yale.edu/catalog/32528678.