MLA
Hess, Fred, and Son. A Group of Firemen in Uniform Standing with Two Fire Engines and a Dog in Front of a Fire Station with a House in the Background. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 54. https://digital.library.emory.edu/purl/006sxksn4w-cor.
APA, 6th edition
Hess, F., & S. A group of firemen in uniform standing with two fire engines and a dog in front of a fire station with a house in the background (Box 54) [Card photographs (photographs)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/006sxksn4w-cor.
Chicago
Hess, Fred, and Son. “A Group of Firemen in Uniform Standing with Two Fire Engines and a Dog in Front of a Fire Station with a House in the Background.” Card photographs (photographs). Robert Langmuir African American Photograph Collection, n.d. Box 54. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/006sxksn4w-cor.