MLA
Son, D. Murphy's. Union Patriotic Envelopes Dealing with Secession - Cartoon of Jefferson Davis as a Spider and the Confederate States as Flies Trapped in the Web. Jefferson Davis Is Trying to Get the Border States Trapped in the Web as Well. "Secession Web 'Walk into My Parlor,' Says the Spider to the Fly," Published by D. Murphy's Son. D. Murphy's Sons, Print, 1861. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 21, Folder 8. https://digital.library.emory.edu/purl/354xgxd391-cor.
APA, 6th edition
Son, D. M. (1861). Union patriotic envelopes dealing with secession - Cartoon of Jefferson Davis as a spider and the Confederate states as flies trapped in the web. Jefferson Davis is trying to get the border states trapped in the web as well. "Secession Web 'Walk into my parlor,' says the Spider to the Fly," Published by D. Murphy's Son (Box 21, Folder 8) [Envelopes]. D. Murphy's Sons, Print; Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/354xgxd391-cor.
Chicago
Son, D. Murphy's. “Union Patriotic Envelopes Dealing with Secession - Cartoon of Jefferson Davis as a Spider and the Confederate States as Flies Trapped in the Web. Jefferson Davis Is Trying to Get the Border States Trapped in the Web as Well. ‘Secession Web 'Walk into My Parlor,' Says the Spider to the Fly," Published by D. Murphy's Son.” Envelopes. Civil War Collection. New York City, NY: D. Murphy's Sons, Print, 1861. Box 21, Folder 8. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/354xgxd391-cor.