MLA
Blank Confederate Form for "Account of Registered Letters Received at the Post Office". 1861. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 2, Folder 32. https://digital.library.emory.edu/purl/641mgqnmk8-cor.
APA, 6th edition
Blank Confederate form for "Account of Registered Letters Received at the Post Office" (Box 2, Folder 32). (1861). [Forms (documents)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/641mgqnmk8-cor.
Chicago
“Blank Confederate Form for ‘Account of Registered Letters Received at the Post Office.’” 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/641mgqnmk8-cor.