MLA
Illustrierte Zeitung, April 13, 1861, No 192, VII, No 10, Cover Only. Illustration Featuring A. B. Roman of Louisiana, John Forsyth, Jr. of Alabama and Martin Crawford of Georgia. Frank Leslie, 1861. Stuart A. Rose Manuscript, Archives, and Rare Book Library, OP9, Folder 29. https://digital.library.emory.edu/purl/9591893358-cor.
APA, 6th edition
Illustrierte Zeitung, April 13, 1861, No 192, VII, No 10, cover only. Illustration featuring A. B. Roman of Louisiana, John Forsyth, Jr. of Alabama and Martin Crawford of Georgia (OP9, Folder 29). (1861). [Illustrations (layout features)]. Frank Leslie; Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/9591893358-cor.
Chicago
“Illustrierte Zeitung, April 13, 1861, No 192, VII, No 10, Cover Only. Illustration Featuring A. B. Roman of Louisiana, John Forsyth, Jr. of Alabama and Martin Crawford of Georgia.” Illustrations (layout features). Civil War Collection. New York City, NY: Frank Leslie, 1861. OP9, Folder 29. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/9591893358-cor.