MLA
Abrams, Alex. St. Clair (Alexander St. Clair). A full and detailed history of the siege of Vicksburg. 1863. Civil War Imprints. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/3311ns1vvp-cor.
APA, 6th edition
Abrams, Alex. St. Clair (Alexander St. Clair). (1863)[A full and detailed history of the siege of Vicksburg]. Civil War Imprints, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/3311ns1vvp-cor.
Chicago
Abrams, Alex. St. Clair (Alexander St. Clair), A full and detailed history of the siege of Vicksburg, 1863, Civil War Imprints, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/3311ns1vvp-cor.