MLA
Slursa (N.Y.). African American man wearing a suit. unknown. Robert Langmuir African American Photograph Collection. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/460qrfj6tm-cor.
APA, 6th edition
Slursa (N.Y.). (unknown)[African American man wearing a suit]. Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/460qrfj6tm-cor.
Chicago
Slursa (N.Y.), African American man wearing a suit, unknown, Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/460qrfj6tm-cor.