MLA
White, J. H. Confederate General Order No. 57 Honorably Discharging Walter Blake from the South Carolina Military Academy. 1862. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 1, Folder 31. https://digital.library.emory.edu/purl/8708w9gk0c-cor.
APA, 6th edition
White, J. H. (1862). Confederate General Order No. 57 honorably discharging Walter Blake from the South Carolina Military Academy (Box 1, Folder 31) [Orders (military records)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/8708w9gk0c-cor.
Chicago
White, J. H. “Confederate General Order No. 57 Honorably Discharging Walter Blake from the South Carolina Military Academy.” Orders (military records). Civil War Collection, 1862. Box 1, Folder 31. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/8708w9gk0c-cor.