MLA
Harper. A Small African American Girl in a Dress Standing next to a Baby. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 61. https://digital.library.emory.edu/purl/716pzgmsf2-cor.
APA, 6th edition
H. A small African American girl in a dress standing next to a baby (Box 61) [Card photographs (photographs)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/716pzgmsf2-cor.
Chicago
Harper. “A Small African American Girl in a Dress Standing next to a Baby.” Card photographs (photographs). Robert Langmuir African American Photograph Collection, n.d. Box 61. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/716pzgmsf2-cor.