MLA
Emancipation : a Man Dressed as Abraham Lincoln Standing over a Freed Slave with a Chain on His Wrist. 1911. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 74. https://digital.library.emory.edu/purl/757np5hqfh-cor.
APA, 6th edition
Emancipation : a man dressed as Abraham Lincoln standing over a freed slave with a chain on his wrist (Box 74). (1911). [Photographic postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/757np5hqfh-cor.
Chicago
“Emancipation : a Man Dressed as Abraham Lincoln Standing over a Freed Slave with a Chain on His Wrist.” Photographic postcards. Robert Langmuir African American Photograph Collection, 1911. Box 74. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/757np5hqfh-cor.