MLA
Letter [Fragment] from an Unknown Soldier to His Family (Warrior-Creek Stand, Alabama). Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 6, Folder 79. https://digital.library.emory.edu/purl/808v9s4nkh-cor.
APA, 6th edition
Letter [fragment] from an unknown soldier to his family (Warrior-Creek Stand, Alabama) (Box 6, Folder 79). [Letters (correspondence)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/808v9s4nkh-cor.
Chicago
“Letter [Fragment] from an Unknown Soldier to His Family (Warrior-Creek Stand, Alabama).” Letters (correspondence). Civil War Collection, n.d. Box 6, Folder 79. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/808v9s4nkh-cor.