MLA
Pierce, George F. (George Foster), 1811-1884. The word of God a nation's life : a sermon, preached before the Bible Convention of the Confederate States, Augusta, Georgia, March 19th, 1862. 1862. Civil War Imprints. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/56341ns4wn-cor.
APA, 6th edition
Pierce, George F. (George Foster), 1811-1884. (1862)[The word of God a nation's life : a sermon, preached before the Bible Convention of the Confederate States, Augusta, Georgia, March 19th, 1862]. Civil War Imprints, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/56341ns4wn-cor.
Chicago
Pierce, George F. (George Foster), 1811-1884, The word of God a nation's life : a sermon, preached before the Bible Convention of the Confederate States, Augusta, Georgia, March 19th, 1862, 1862, Civil War Imprints, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/56341ns4wn-cor.