MLA
Rogers, J. Engraving of Union General Nathaniel Lyon during the Battle of Wilson’s Creek on August 10, 1861. Stuart A. Rose Manuscript, Archives, and Rare Book Library, OP9, Folder 27. https://digital.library.emory.edu/purl/904dncjv7d-cor.
APA, 6th edition
Rogers, J. Engraving of Union general Nathaniel Lyon during the Battle of Wilson’s Creek on August 10, 1861 (OP9, Folder 27) [Engravings (prints)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/904dncjv7d-cor.
Chicago
Rogers, J. “Engraving of Union General Nathaniel Lyon during the Battle of Wilson’s Creek on August 10, 1861.” Engravings (prints). Civil War Collection, n.d. OP9, Folder 27. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/904dncjv7d-cor.