MLA
Perrin, Cora Lee. Letter from Cora Lee Perrin (Natchez, Mississippi) to Mrs. A. F. Hodges (Andersonville, Georgia), Thanking Her for Her Efforts to Vindicate Her Father, Major Henry Wirz, the Commander of Andersonville Prison - February 22, 1908 (Photocopy). 1908. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 9, Folder 23. https://digital.library.emory.edu/purl/006sxksp2r-cor.
APA, 6th edition
Perrin, C. L. (1908). Letter from Cora Lee Perrin (Natchez, Mississippi) to Mrs. A. F. Hodges (Andersonville, Georgia), thanking her for her efforts to vindicate her father, Major Henry Wirz, the commander of Andersonville prison - February 22, 1908 (photocopy) (Box 9, Folder 23) [Letters (correspondence)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/006sxksp2r-cor.
Chicago
Perrin, Cora Lee. “Letter from Cora Lee Perrin (Natchez, Mississippi) to Mrs. A. F. Hodges (Andersonville, Georgia), Thanking Her for Her Efforts to Vindicate Her Father, Major Henry Wirz, the Commander of Andersonville Prison - February 22, 1908 (Photocopy).” Letters (correspondence). Civil War Collection, 1908. Box 9, Folder 23. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/006sxksp2r-cor.