MLA
Sullivan Bros. (N.Y.). African American baby girl in a dress with a bow in her hair seated on the arm of a wicker chair. unknown. Robert Langmuir African American Photograph Collection. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/583kwh70z2-cor.
APA, 6th edition
Sullivan Bros. (N.Y.). (unknown)[African American baby girl in a dress with a bow in her hair seated on the arm of a wicker chair]. Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/583kwh70z2-cor.
Chicago
Sullivan Bros. (N.Y.), African American baby girl in a dress with a bow in her hair seated on the arm of a wicker chair, unknown, Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/583kwh70z2-cor.