MLA
Werner, V., and Co. Proposal for Sale of the "Dixie Works" Industrial Site (Macon, Georgia) to the Confederate States Government (Typescript). 1861. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 7, Folder 19. https://digital.library.emory.edu/purl/392g79cprh-cor.
APA, 6th edition
Werner, V., & C. (1861). Proposal for sale of the "Dixie Works" industrial site (Macon, Georgia) to the Confederate States government (typescript) (Box 7, Folder 19) [Proposals]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/392g79cprh-cor.
Chicago
Werner, V., and Co. “Proposal for Sale of the ‘Dixie Works’ Industrial Site (Macon, Georgia) to the Confederate States Government (Typescript).” Proposals. Civil War Collection, 1861. Box 7, Folder 19. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/392g79cprh-cor.