MLA
Roberts, Walter H. Letter from Walter H. Roberts (Fairhope, Alabama) to John A. Marks (Memphis, Tennessee) Regarding the Civil War Letters of Henry W. Hart - February 13, 1975 (Photocopy). 1975. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 19, Folder 32. https://digital.library.emory.edu/purl/3246q574sn-cor.
APA, 6th edition
Roberts, W. H. (1975). Letter from Walter H. Roberts (Fairhope, Alabama) to John A. Marks (Memphis, Tennessee) regarding the Civil War letters of Henry W. Hart - February 13, 1975 (photocopy) (Box 19, Folder 32) [Letters (correspondence)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/3246q574sn-cor.
Chicago
Roberts, Walter H. “Letter from Walter H. Roberts (Fairhope, Alabama) to John A. Marks (Memphis, Tennessee) Regarding the Civil War Letters of Henry W. Hart - February 13, 1975 (Photocopy).” Letters (correspondence). Civil War Collection, 1975. Box 19, Folder 32. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/3246q574sn-cor.