MLA

Charlotte Augusta, Princess of Great Britain, 1796-1817. An original letter addressed by the late Princess Charlotte to her mother, the Princess of Wales, now Queen of England, in October, 1817. [1822]. https://collections.library.yale.edu/catalog/33111736.

APA, 6th edition

Charlotte Augusta, Princess of Great Britain, 1796-1817. ([1822])[An original letter addressed by the late Princess Charlotte to her mother, the Princess of Wales, now Queen of England, in October, 1817]. https://collections.library.yale.edu/catalog/33111736.