MLA
Winder, John H. (John Henry), 1800-1865. Letter from Confederate General John Henry Winder (Andersonville, Georgia) to Dr. A. Reedy [?], (Americus, Georgia), stating that the camp "is one of the healthiest locations in this part of the Confederacy" - October 5, 1864 (photocopy). October 5, 1864. Civil War Collection. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/846d2548k3-cor.
APA, 6th edition
Winder, John H. (John Henry), 1800-1865. (October 5, 1864)[Letter from Confederate General John Henry Winder (Andersonville, Georgia) to Dr. A. Reedy [?], (Americus, Georgia), stating that the camp "is one of the healthiest locations in this part of the Confederacy" - October 5, 1864 (photocopy)]. Civil War Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/846d2548k3-cor.
Chicago
Winder, John H. (John Henry), 1800-1865, Letter from Confederate General John Henry Winder (Andersonville, Georgia) to Dr. A. Reedy [?], (Americus, Georgia), stating that the camp "is one of the healthiest locations in this part of the Confederacy" - October 5, 1864 (photocopy), October 5, 1864, Civil War Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/846d2548k3-cor.