MLA
Robert Edward Lee in Civilian Clothing. 1865. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 16, Folder 45. https://digital.library.emory.edu/purl/5977sqvbh5-cor.
APA, 6th edition
Robert Edward Lee in civilian clothing (Box 16, Folder 45). (1865). [Cartes-de-visite (card photographs)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/5977sqvbh5-cor.
Chicago
“Robert Edward Lee in Civilian Clothing.” Cartes-de-visite (card photographs). Civil War Collection, 1865. Box 16, Folder 45. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/5977sqvbh5-cor.