MLA

Sanford, George B. (George Bliss), 1842-1908. Sanford, George Bliss. Box 1 | Folder 41. 1893 February 8. https://collections.library.yale.edu/catalog/17157759.

APA, 6th edition

Sanford, George B. (George Bliss), 1842-1908. (["Box 1 | Folder 41"])(1893 February 8)[Sanford, George Bliss]. https://collections.library.yale.edu/catalog/17157759.