MLA

Johnson, A. B. (Alexander Bryan), 1786-1867. 1857 July. Box 4, folder 28. 1823-1861. https://collections.library.yale.edu/catalog/32531712.

APA, 6th edition

Johnson, A. B. (Alexander Bryan), 1786-1867. (["Box 4, folder 28"])(1823-1861)[1857 July]. https://collections.library.yale.edu/catalog/32531712.