Cite

Letter : to an unidentified recipient

MLA

Cable, George Washington, 1844-1925. Letter : to an unidentified recipient. Box 7, folder GROUP 118, F-3. 1887 Aug 11. https://collections.library.yale.edu/catalog/17234163.

APA, 6th edition

Cable, George Washington, 1844-1925. (["Box 7, folder GROUP 118, F-3"])(1887 Aug 11)[Letter : to an unidentified recipient]. https://collections.library.yale.edu/catalog/17234163.