MLA
Pushball - Students Run toward Ball from Opposite Directions. 1950. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 5, Folder 4. https://digital.library.emory.edu/purl/26663xsjrs-cor.
APA, 6th edition
Pushball - Students run toward ball from opposite directions (Box 5, Folder 4). (1950). [Black-and-white photographs]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/26663xsjrs-cor.
Chicago
“Pushball - Students Run toward Ball from Opposite Directions.” Black-and-white photographs. Emory University Office of Alumni Publications Photographs, 1950. Box 5, Folder 4. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/26663xsjrs-cor.