MLA

Wheaton, Joseph, 1755-1828. Bloomfield, Joseph (1753-1823), autograph letter signed to Wheaton. Box 1, folder 2. 1813 November 7. https://collections.library.yale.edu/catalog/32528268.

APA, 6th edition

Wheaton, Joseph, 1755-1828. (["Box 1, folder 2"])(1813 November 7)[Bloomfield, Joseph (1753-1823), autograph letter signed to Wheaton]. https://collections.library.yale.edu/catalog/32528268.