MLA
Davis, Varina Anne Banks Howell. Note from Varina Anne Banks Howell Davis (Savannah, Georgia) Regarding Margaret Fagan's Baggage. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 2, Folder 50. https://digital.library.emory.edu/purl/624jm63zt5-cor.
APA, 6th edition
Davis, V. A. B. H. Note from Varina Anne Banks Howell Davis (Savannah, Georgia) regarding Margaret Fagan's baggage (Box 2, Folder 50) [Notes]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/624jm63zt5-cor.
Chicago
Davis, Varina Anne Banks Howell. “Note from Varina Anne Banks Howell Davis (Savannah, Georgia) Regarding Margaret Fagan's Baggage.” Notes. Civil War Collection, n.d. Box 2, Folder 50. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/624jm63zt5-cor.