[Letter], 1824 Jan 14 [to] General William Clark
MLA
Clark, William, 1770-1838, OFallon, Benjamin, 1793-1842. [Letter], 1824 Jan 14 [to] General William Clark. https://collections.library.yale.edu/catalog/2017849.
APA, 6th edition
Clark, William, 1770-1838, & OFallon, Benjamin, 1793-1842. [[Letter], 1824 Jan 14 [to] General William Clark]. https://collections.library.yale.edu/catalog/2017849.