MLA
Pollard, Edward Alfred, 1831-1872. The second battle of Manassas : with sketches of the recent campaign in northern Virginia and on the upper Potomac : prepared from special materials. 1862. Civil War Imprints. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/2902z34z0z-cor.
APA, 6th edition
Pollard, Edward Alfred, 1831-1872. (1862)[The second battle of Manassas : with sketches of the recent campaign in northern Virginia and on the upper Potomac : prepared from special materials]. Civil War Imprints, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/2902z34z0z-cor.
Chicago
Pollard, Edward Alfred, 1831-1872, The second battle of Manassas : with sketches of the recent campaign in northern Virginia and on the upper Potomac : prepared from special materials, 1862, Civil War Imprints, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/2902z34z0z-cor.