MLA
Girl Holding an American Flag, Riding a Pony. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 5. https://digital.library.emory.edu/purl/0515mkkwnx-cor.
APA, 6th edition
Girl holding an American flag, riding a pony (Box 5). [Black-and-white photographs]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/0515mkkwnx-cor.
Chicago
“Girl Holding an American Flag, Riding a Pony.” Black-and-white photographs. Robert Langmuir African American Photograph Collection, n.d. Box 5. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/0515mkkwnx-cor.