MLA
Two African American Girls, One Wearing a Hat, Sitting on a Bench Together, with Snakes in Their Laps. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 72. https://digital.library.emory.edu/purl/020fttdz22-cor.
APA, 6th edition
Two African American girls, one wearing a hat, sitting on a bench together, with snakes in their laps (Box 72). [Photographic postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/020fttdz22-cor.
Chicago
“Two African American Girls, One Wearing a Hat, Sitting on a Bench Together, with Snakes in Their Laps.” 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/020fttdz22-cor.