MLA
Portrait of Three African American Boys. 1903. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 72. https://digital.library.emory.edu/purl/020fttdz1x-cor.
APA, 6th edition
Portrait of three African American boys (Box 72). (1903). [Postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/020fttdz1x-cor.
Chicago
“Portrait of Three African American Boys.” Postcards. Robert Langmuir African American Photograph Collection, 1903. Box 72. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/020fttdz1x-cor.