MLA
Boy Wearing Knickers Standing next to a Wooden Chair in Front of a Cloth Backdrop. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 6. https://digital.library.emory.edu/purl/180vq83br4-cor.
APA, 6th edition
Boy wearing knickers standing next to a wooden chair in front of a cloth backdrop (Box 6). [Card photographs (photographs)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/180vq83br4-cor.
Chicago
“Boy Wearing Knickers Standing next to a Wooden Chair in Front of a Cloth Backdrop.” Card photographs (photographs). Robert Langmuir African American Photograph Collection, n.d. Box 6. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/180vq83br4-cor.