Letter signed. 10 1/2 pages, folio. Partly in code, with accompanying decode on a separate page. Philadelphia.
MLA
family, Rochambeau. Letter Signed. 10 1/2 Pages, Folio. Partly in Code, with Accompanying Decode on a Separate Page. Philadelphia. 1781. https://collections.library.yale.edu/catalog/16490985.
APA, 6th edition
family, R. (1781). Letter signed. 10 1/2 pages, folio. Partly in code, with accompanying decode on a separate page. Philadelphia. https://collections.library.yale.edu/catalog/16490985.