MLA

Wheaton, Joseph, 1755-1828. Jefferson, Thomas, President U.S., (1743-1826), autograph letter signed to Wheaton. Box 1, folder 15. 1814 January 29. https://collections.library.yale.edu/catalog/32528346.

APA, 6th edition

Wheaton, Joseph, 1755-1828. (["Box 1, folder 15"])(1814 January 29)[Jefferson, Thomas, President U.S., (1743-1826), autograph letter signed to Wheaton]. https://collections.library.yale.edu/catalog/32528346.