MLA

MacDonald, George, 1824-1905. Charrington, Edward. Box 1, folder 56. 1865 Jun 15. https://collections.library.yale.edu/catalog/17297723.

APA, 6th edition

MacDonald, George, 1824-1905. (["Box 1, folder 56"])(1865 Jun 15)[Charrington, Edward]. https://collections.library.yale.edu/catalog/17297723.