MLA
Calhoun, Archibald McLucas. Letter from Archibald McLucas Calhoun to His Cousin Roderick S McLucas. Calhoun Was a Member of the 21st South Carolina Infantry Regiment. McLucas Was a Member of the 23rd South Carolina Infantry Regiment - May 30, 1863 (Photocopy). 1863. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 2, Folder 3. https://digital.library.emory.edu/purl/7612ngf2th-cor.
APA, 6th edition
Calhoun, A. M. L. (1863). Letter from Archibald McLucas Calhoun to his cousin Roderick S McLucas. Calhoun was a member of the 21st South Carolina Infantry Regiment. McLucas was a member of the 23rd South Carolina Infantry Regiment - May 30, 1863 (photocopy) (Box 2, Folder 3) [Letters (correspondence)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/7612ngf2th-cor.
Chicago
Calhoun, Archibald McLucas. “Letter from Archibald McLucas Calhoun to His Cousin Roderick S McLucas. Calhoun Was a Member of the 21st South Carolina Infantry Regiment. McLucas Was a Member of the 23rd South Carolina Infantry Regiment - May 30, 1863 (Photocopy).” Letters (correspondence). Civil War Collection, 1863. Box 2, Folder 3. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/7612ngf2th-cor.