MLA
Blank Confederate States Army Oath for Postmaster, Assistant Postmaster or Mail Carrier. 1861. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 2, Folder 32. https://digital.library.emory.edu/purl/389280gccm-cor.
APA, 6th edition
Blank Confederate States Army Oath for Postmaster, Assistant Postmaster or Mail Carrier (Box 2, Folder 32). (1861). [Forms (documents)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/389280gccm-cor.
Chicago
“Blank Confederate States Army Oath for Postmaster, Assistant Postmaster or Mail Carrier.” Forms (documents). Civil War Collection, 1861. Box 2, Folder 32. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/389280gccm-cor.