Cite

Autograph letter signed. 4 pages, folio. Philadelphia.

MLA

family, Rochambeau. Autograph Letter Signed. 4 Pages, Folio. Philadelphia. 0AD. https://collections.library.yale.edu/catalog/16490981.

APA, 6th edition

family, R. (0 C.E.). Autograph letter signed. 4 pages, folio. Philadelphia. https://collections.library.yale.edu/catalog/16490981.