MLA
African American Girl Sitting on a Chair with Flowers on It. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 72. https://digital.library.emory.edu/purl/3009w0vt63-cor.
APA, 6th edition
African American girl sitting on a chair with flowers on it (Box 72). [Photographic postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/3009w0vt63-cor.
Chicago
“African American Girl Sitting on a Chair with Flowers on It.” Photographic postcards. Robert Langmuir African American Photograph Collection, n.d. Box 72. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/3009w0vt63-cor.