MLA
Berlin, and Jones. Union Patriotic Envelopes - Man Surrounded by Symbols of the South "Repudiation". Published by Berlin & Jones. Berlin & Jones, 1861. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 21, Folder 9. https://digital.library.emory.edu/purl/863fxpnx32-cor.
APA, 6th edition
B., & J. (1861). Union patriotic envelopes - Man surrounded by symbols of the south "Repudiation". Published by Berlin & Jones (Box 21, Folder 9) [Envelopes]. Berlin & Jones; Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/863fxpnx32-cor.
Chicago
Berlin, and Jones. “Union Patriotic Envelopes - Man Surrounded by Symbols of the South ‘Repudiation’. Published by Berlin & Jones.” Envelopes. Civil War Collection. New York City, NY: Berlin & Jones, 1861. Box 21, Folder 9. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/863fxpnx32-cor.