MLA
Letter from "Your Loving Sister, A. E. D." (Solitude, Georgia) to "My Ever Dear Brother," Describing the Devastation Caused by General Sherman's Atlanta Campaign, Especially in Decatur - December 6, 1864. 1864. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 6, Folder 60. https://digital.library.emory.edu/purl/409j3tx9vz-cor.
APA, 6th edition
Letter from "Your loving Sister, A. E. D." (Solitude, Georgia) to "My Ever Dear Brother," describing the devastation caused by General Sherman's Atlanta Campaign, especially in Decatur - December 6, 1864 (Box 6, Folder 60). (1864). [Letters (correspondence)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/409j3tx9vz-cor.
Chicago
“Letter from ‘Your Loving Sister, A. E. D." (Solitude, Georgia) to ‘My Ever Dear Brother," Describing the Devastation Caused by General Sherman's Atlanta Campaign, Especially in Decatur - December 6, 1864.” Letters (correspondence). Civil War Collection, 1864. Box 6, Folder 60. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/409j3tx9vz-cor.