MLA
Chase-Riboud, Barbara. Telegram Sent by Barbara Chase-Riboud (Paris, France) to Her Mother, Vivian May Chase (Philadelphia, Pennsylvania) Wishing Her a Merry Christmas - December 26, 1963. 1963. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 1, Folder 3. https://digital.library.emory.edu/purl/53976hds51-cor.
APA, 6th edition
Chase-Riboud, B. (1963). Telegram sent by Barbara Chase-Riboud (Paris, France) to her mother, Vivian May Chase (Philadelphia, Pennsylvania) wishing her a Merry Christmas - December 26, 1963 (Box 1, Folder 3) [Letters (correspondence)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/53976hds51-cor.
Chicago
Chase-Riboud, Barbara. “Telegram Sent by Barbara Chase-Riboud (Paris, France) to Her Mother, Vivian May Chase (Philadelphia, Pennsylvania) Wishing Her a Merry Christmas - December 26, 1963.” Letters (correspondence). Barbara Chase-Riboud Papers, 1963. Box 1, Folder 3. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/53976hds51-cor.