MLA
The Political Siamese Twins. Union General George B. McClellan and Antiwar Democrat George H. Pendleton Are Joined by "The Party Tie". Currier & Ives, 1864. Stuart A. Rose Manuscript, Archives, and Rare Book Library, OP9, Folder 4. https://digital.library.emory.edu/purl/631cjsxn00-cor.
APA, 6th edition
The Political Siamese Twins. Union general George B. McClellan and antiwar Democrat George H. Pendleton are joined by "The Party Tie" (OP9, Folder 4). (1864). [Political cartoons]. Currier & Ives; Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/631cjsxn00-cor.
Chicago
“The Political Siamese Twins. Union General George B. McClellan and Antiwar Democrat George H. Pendleton Are Joined by ‘The Party Tie.’” Political cartoons. Civil War Collection. New York City, NY: Currier & Ives, 1864. OP9, Folder 4. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/631cjsxn00-cor.