MLA
Johnsbeck, J. Letter from J. Johnsbeck[?] (Grahamville , South Carolina) to "Dear Solon" - January 1, 1861. 1861. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 5, Folder 62. https://digital.library.emory.edu/purl/259c59zx4s-cor.
APA, 6th edition
Johnsbeck, J. (1861). Letter from J. Johnsbeck[?] (Grahamville , South Carolina) to "Dear Solon" - January 1, 1861 (Box 5, Folder 62) [Letters (correspondence)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/259c59zx4s-cor.
Chicago
Johnsbeck, J.[?]. “Letter from J. Johnsbeck[?] (Grahamville , South Carolina) to ‘Dear Solon’ - January 1, 1861.” Letters (correspondence). Civil War Collection, 1861. Box 5, Folder 62. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/259c59zx4s-cor.