MLA
Patrolman Koffmer with a Child on His Knee, and Others Standing next to Him. 1929. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 5. https://digital.library.emory.edu/purl/419s1rn8vc-cor.
APA, 6th edition
Patrolman Koffmer with a child on his knee, and others standing next to him (Box 5). (1929). [Black-and-white photographs]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/419s1rn8vc-cor.
Chicago
“Patrolman Koffmer with a Child on His Knee, and Others Standing next to Him.” Black-and-white photographs. Robert Langmuir African American Photograph Collection, 1929. Box 5. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/419s1rn8vc-cor.