MLA
Simmons, Lonnie. Men Looking at a Machine Part, next to a Large Camera. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 30. https://digital.library.emory.edu/purl/4644qrfjcd-cor.
APA, 6th edition
Simmons, L. Men looking at a machine part, next to a large camera (Box 30) [Black-and-white photographs]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/4644qrfjcd-cor.
Chicago
Simmons, Lonnie. “Men Looking at a Machine Part, next to a Large Camera.” Black-and-white photographs. Robert Langmuir African American Photograph Collection, n.d. Box 30. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/4644qrfjcd-cor.