MLA
... (Washington, D.C.). Portrait of an African American man in a suit with a bow tie and mustache. unknown. Robert Langmuir African American Photograph Collection. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/180vq83bs0-cor.
APA, 6th edition
... (Washington, D.C.). (unknown)[Portrait of an African American man in a suit with a bow tie and mustache]. Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/180vq83bs0-cor.
Chicago
... (Washington, D.C.), Portrait of an African American man in a suit with a bow tie and mustache, unknown, Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/180vq83bs0-cor.