MLA
Dunbar Studio (St. Louis, Mo.). Two African American woman in dresses : one is wearing glasses and standing. unknown. Robert Langmuir African American Photograph Collection. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/989r2280jp-cor.
APA, 6th edition
Dunbar Studio (St. Louis, Mo.). (unknown)[Two African American woman in dresses : one is wearing glasses and standing]. Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/989r2280jp-cor.
Chicago
Dunbar Studio (St. Louis, Mo.), Two African American woman in dresses : one is wearing glasses and standing, unknown, Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/989r2280jp-cor.