MLA
Kytle, Calum. Pushball - Students Running and Falling on the Grass. 1925. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 5, Folder 4. https://digital.library.emory.edu/purl/1439zw3rph-cor.
APA, 6th edition
Kytle, C. (1925). Pushball - Students running and falling on the grass (Box 5, Folder 4) [Black-and-white photographs]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/1439zw3rph-cor.
Chicago
Kytle, Calum. “Pushball - Students Running and Falling on the Grass.” Black-and-white photographs. Emory University Office of Alumni Publications Photographs, 1925. Box 5, Folder 4. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/1439zw3rph-cor.