MLA
Nash, J. F., 1836 or 1837-. Union patriotic envelopes - "Hemp for traitors North or South" Published by J. F. Nash. 1861?/1865?. Civil War Collection. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/24947d7xsn-cor.
APA, 6th edition
Nash, J. F., 1836 or 1837-. (1861?/1865?)[Union patriotic envelopes - "Hemp for traitors North or South" Published by J. F. Nash]. Civil War Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/24947d7xsn-cor.
Chicago
Nash, J. F., 1836 or 1837-, Union patriotic envelopes - "Hemp for traitors North or South" Published by J. F. Nash, 1861?/1865?, Civil War Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/24947d7xsn-cor.