MLA
Four African American Boys Sitting in Front of a Fence, with a Chicken in the Background. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 72. https://digital.library.emory.edu/purl/651vdncjw0-cor.
APA, 6th edition
Four African American boys sitting in front of a fence, with a chicken in the background (Box 72). [Photographic postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/651vdncjw0-cor.
Chicago
“Four African American Boys Sitting in Front of a Fence, with a Chicken in the Background.” 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/651vdncjw0-cor.