MLA

Davis, Andrew Jackson, 1826-1910. 1876-1879. Box 1, folder 18. 1848-1929. https://collections.library.yale.edu/catalog/32528668.

APA, 6th edition

Davis, Andrew Jackson, 1826-1910. (["Box 1, folder 18"])(1848-1929)[1876-1879]. https://collections.library.yale.edu/catalog/32528668.