MLA
Engraving of Confederate General Ambrose P. Hill, Published by Kurz & Allison. Kurz & Allison. Stuart A. Rose Manuscript, Archives, and Rare Book Library, OP15. https://digital.library.emory.edu/purl/781jh9w22s-cor.
APA, 6th edition
Engraving of Confederate General Ambrose P. Hill, published by Kurz & Allison (OP15). [Engravings (prints)]. Kurz & Allison; Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/781jh9w22s-cor.
Chicago
“Engraving of Confederate General Ambrose P. Hill, Published by Kurz & Allison.” Engravings (prints). Civil War Collection. Chicago, IL: Kurz & Allison, n.d. OP15. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/781jh9w22s-cor.