MLA

MacDonald, George, 1824-1905. "M" general. Box 2, folder 100. 1853-74. https://collections.library.yale.edu/catalog/17297729.

APA, 6th edition

MacDonald, George, 1824-1905. (["Box 2, folder 100"])(1853-74)["M" general]. https://collections.library.yale.edu/catalog/17297729.