MLA
The Folly of Secession. Governor F. W. Pickens of South Carolina and President James Buchanan Fight over the Union Cow as Georgia Milks the Cow into a Bucket Labeled "City of Savannah.". Currier & Ives, 1861. Stuart A. Rose Manuscript, Archives, and Rare Book Library, OP10, Folder 1. https://digital.library.emory.edu/purl/9354f4qspq-cor.
APA, 6th edition
The Folly of Secession. Governor F. W. Pickens of South Carolina and President James Buchanan fight over the Union cow as Georgia milks the cow into a bucket labeled "City of Savannah." (OP10, Folder 1). (1861). [Political cartoons]. Currier & Ives; Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/9354f4qspq-cor.
Chicago
“The Folly of Secession. Governor F. W. Pickens of South Carolina and President James Buchanan Fight over the Union Cow as Georgia Milks the Cow into a Bucket Labeled ‘City of Savannah.".” Political cartoons. Civil War Collection. New York City, NY: Currier & Ives, 1861. OP10, Folder 1. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/9354f4qspq-cor.