MLA
Valentine, and Sons. Florida Pickaninnies : Three African American Boys Sitting on a Fence [Hand Colored]. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 73. https://digital.library.emory.edu/purl/692t4b8gxb-cor.
APA, 6th edition
V., & S. Florida pickaninnies : three African American boys sitting on a fence [hand colored] (Box 73) [Photographic postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/692t4b8gxb-cor.
Chicago
Valentine, and Sons. “Florida Pickaninnies : Three African American Boys Sitting on a Fence [Hand Colored].” Photographic postcards. Robert Langmuir African American Photograph Collection, n.d. Box 73. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/692t4b8gxb-cor.