MLA
South Carolina's Ultimatum. Governor F. W. Pickens of South Carolina Is Standing before the "Peace Maker" Cannon as He Lights It While President James Buchanan Looks on in Alarm. The Union Flag Flies over Fort Sumter in the Distance. Currier & Ives, 1861. Stuart A. Rose Manuscript, Archives, and Rare Book Library, OP9, Folder 6. https://digital.library.emory.edu/purl/948sbcc3ps-cor.
APA, 6th edition
South Carolina's Ultimatum. Governor F. W. Pickens of South Carolina is standing before the "Peace Maker" cannon as he lights it while President James Buchanan looks on in alarm. The Union flag flies over Fort Sumter in the distance (OP9, Folder 6). (1861). [Political cartoons]. Currier & Ives; Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/948sbcc3ps-cor.
Chicago
“South Carolina's Ultimatum. Governor F. W. Pickens of South Carolina Is Standing before the ‘Peace Maker’ Cannon as He Lights It While President James Buchanan Looks on in Alarm. The Union Flag Flies over Fort Sumter in the Distance.” Political cartoons. Civil War Collection. New York City, NY: Currier & Ives, 1861. OP9, Folder 6. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/948sbcc3ps-cor.