MLA
Peggy, an African American Girl with a Bow in Her Hair, with One Hand on Top of a Flower Vase. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 35. https://digital.library.emory.edu/purl/6623bk3jgp-cor.
APA, 6th edition
Peggy, an African American girl with a bow in her hair, with one hand on top of a flower vase (Box 35). [Photographic postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/6623bk3jgp-cor.
Chicago
“Peggy, an African American Girl with a Bow in Her Hair, with One Hand on Top of a Flower Vase.” Photographic postcards. Robert Langmuir African American Photograph Collection, n.d. Box 35. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/6623bk3jgp-cor.