MLA
Three Children Sitting on Donkeys in Front of a Rock Formation, with an African American Woman Standing next to Them. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 28. https://digital.library.emory.edu/purl/665h9w0vzp-cor.
APA, 6th edition
Three children sitting on donkeys in front of a rock formation, with an African American woman standing next to them (Box 28). [Photographic postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/665h9w0vzp-cor.
Chicago
“Three Children Sitting on Donkeys in Front of a Rock Formation, with an African American Woman Standing next to Them.” Photographic postcards. Robert Langmuir African American Photograph Collection, n.d. Box 28. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/665h9w0vzp-cor.