MLA
Souvenir Post Card Co. (N.Y.). Coons : five African American boys sitting on a box. unknown. Robert Langmuir African American Photograph Collection. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/003cz8w9jz-cor.
APA, 6th edition
Souvenir Post Card Co. (N.Y.). (unknown)[Coons : five African American boys sitting on a box]. Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/003cz8w9jz-cor.
Chicago
Souvenir Post Card Co. (N.Y.), Coons : five African American boys sitting on a box, unknown, Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/003cz8w9jz-cor.