MLA

MacDonald, George, 1824-1905. Hill, Octavia Hill, Emily. Box 2, folder 81-82. 1869-1910. https://collections.library.yale.edu/catalog/16474492.

APA, 6th edition

MacDonald, George, 1824-1905. (["Box 2, folder 81-82"])(1869-1910)[Hill, Octavia Hill, Emily]. https://collections.library.yale.edu/catalog/16474492.