[Letter: to undisclosed recipient]
MLA
Shrewsbury, Charles Talbot, Duke of, 1660-1718. [Letter: to undisclosed recipient]. Box 1 | Folder 4. 1694 May 18. https://collections.library.yale.edu/catalog/9998672.
APA, 6th edition
Shrewsbury, Charles Talbot, Duke of, 1660-1718. (["Box 1 | Folder 4"])(1694 May 18)[[Letter: to undisclosed recipient]]. https://collections.library.yale.edu/catalog/9998672.