MLA
Boy Riding a Pony in Front of a Wooden House with Rocking Chair in Front of Window. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 6. https://digital.library.emory.edu/purl/197xksn082-cor.
APA, 6th edition
Boy riding a pony in front of a wooden house with rocking chair in front of window (Box 6). [Black-and-white photographs]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/197xksn082-cor.
Chicago
“Boy Riding a Pony in Front of a Wooden House with Rocking Chair in Front of Window.” Black-and-white 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/197xksn082-cor.