MLA
Harris Portrait (St. Louis, Mo.). African American girl with pig-tails wearing a dress seated on wooden sofa. unknown. Robert Langmuir African American Photograph Collection. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/1504xgxd6z-cor.
APA, 6th edition
Harris Portrait (St. Louis, Mo.). (unknown)[African American girl with pig-tails wearing a dress seated on wooden sofa]. Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/1504xgxd6z-cor.
Chicago
Harris Portrait (St. Louis, Mo.), African American girl with pig-tails wearing a dress seated on wooden sofa, unknown, Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/1504xgxd6z-cor.