MLA

MacDonald, George, 1824-1905. Lynch, Thomas. Box 2, folder 98. 1851-53. https://collections.library.yale.edu/catalog/16474496.

APA, 6th edition

MacDonald, George, 1824-1905. (["Box 2, folder 98"])(1851-53)[Lynch, Thomas]. https://collections.library.yale.edu/catalog/16474496.