MLA
Withers, John. Extract from Special Orders No. 2 from John Withers to J. M. Hawkins (Richmond, Virginia) - January 3, 1862. 1862. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 7, Folder 38. https://digital.library.emory.edu/purl/1848pk0q48-cor.
APA, 6th edition
Withers, J. (1862). Extract from Special Orders No. 2 from John Withers to J. M. Hawkins (Richmond, Virginia) - January 3, 1862 (Box 7, Folder 38) [Orders (military records)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/1848pk0q48-cor.
Chicago
Withers, John. “Extract from Special Orders No. 2 from John Withers to J. M. Hawkins (Richmond, Virginia) - January 3, 1862.” Orders (military records). Civil War Collection, 1862. Box 7, Folder 38. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/1848pk0q48-cor.