MLA
Dunbar Studio (St. Louis, Mo.). A portrait of an African American woman, with a flower on her blouse. unknown. Robert Langmuir African American Photograph Collection. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/6451g1jwwn-cor.
APA, 6th edition
Dunbar Studio (St. Louis, Mo.). (unknown)[A portrait of an African American woman, with a flower on her blouse]. Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/6451g1jwwn-cor.
Chicago
Dunbar Studio (St. Louis, Mo.), A portrait of an African American woman, with a flower on her blouse, unknown, Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/6451g1jwwn-cor.