MLA

Boswell, James, 1740-1795. Appellation. Box 79, folder 1554. 1510. https://collections.library.yale.edu/catalog/11977882.

APA, 6th edition

Boswell, James, 1740-1795. (["Box 79, folder 1554"])(1510)[Appellation]. https://collections.library.yale.edu/catalog/11977882.