MLA
Young Man Jumping into a Lake, While Another Swims, and Another Waits in Line. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 5. https://digital.library.emory.edu/purl/593ttdz0fx-cor.
APA, 6th edition
Young man jumping into a lake, while another swims, and another waits in line (Box 5). [Black-and-white photographs]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/593ttdz0fx-cor.
Chicago
“Young Man Jumping into a Lake, While Another Swims, and Another Waits in Line.” Black-and-white photographs. Robert Langmuir African American Photograph Collection, n.d. Box 5. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/593ttdz0fx-cor.