MLA
Walker, John Burns. Lithograph of Andersonville Prison (Georgia). "Representing the Imprisonment of 33,000 Union Soldiers during the Months of June, July, and August, 1864," Sketched by John Burns Walker, Company G, 141st Regiment. T. Sinclairs Lith., 1865. Stuart A. Rose Manuscript, Archives, and Rare Book Library, OP10, Folder 6. https://digital.library.emory.edu/purl/238w9ghz9j-cor.
APA, 6th edition
Walker, J. B. (1865). Lithograph of Andersonville Prison (Georgia). "Representing the imprisonment of 33,000 Union soldiers during the months of June, July, and August, 1864," sketched by John Burns Walker, Company G, 141st Regiment (OP10, Folder 6) [Lithographs]. T. Sinclairs Lith.; Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/238w9ghz9j-cor.
Chicago
Walker, John Burns. “Lithograph of Andersonville Prison (Georgia). ‘Representing the Imprisonment of 33,000 Union Soldiers during the Months of June, July, and August, 1864," Sketched by John Burns Walker, Company G, 141st Regiment.” Lithographs. Civil War Collection. Philadelphia, PA: T. Sinclairs Lith., 1865. OP10, Folder 6. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/238w9ghz9j-cor.