MLA
Two Boys : Carl and Peter. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 4. https://digital.library.emory.edu/purl/651vdnck0j-cor.
APA, 6th edition
Two boys : Carl and Peter (Box 4). [Black-and-white photographs]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/651vdnck0j-cor.
Chicago
“Two Boys : Carl and Peter.” Black-and-white photographs. Robert Langmuir African American Photograph Collection, n.d. Box 4. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/651vdnck0j-cor.