MLA
Moffitt, Milo, and Aaron Moffitt Jr. Letter from Aaron Moffitt Jr. and Milo Moffitt to His Father, Aaron Moffitt Sr. (Pleasant Grove, Virginia). Aaron Jr. and Milo Served in the 62nd and 44th North Carolina Infantry Regiments Respectively - November 9, 1863. 1863. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 5, Folder 24. https://digital.library.emory.edu/purl/525k98sg8q-cor.
APA, 6th edition
Moffitt, M., & Moffitt, A., Jr. (1863). Letter from Aaron Moffitt Jr. and Milo Moffitt to his father, Aaron Moffitt Sr. (Pleasant Grove, Virginia). Aaron Jr. and Milo served in the 62nd and 44th North Carolina Infantry Regiments respectively - November 9, 1863 (Box 5, Folder 24) [Letters (correspondence)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/525k98sg8q-cor.
Chicago
Moffitt, Milo, and Aaron Moffitt Jr. “Letter from Aaron Moffitt Jr. and Milo Moffitt to His Father, Aaron Moffitt Sr. (Pleasant Grove, Virginia). Aaron Jr. and Milo Served in the 62nd and 44th North Carolina Infantry Regiments Respectively - November 9, 1863.” Letters (correspondence). Civil War Collection, 1863. Box 5, Folder 24. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/525k98sg8q-cor.