MLA
Two African American Women in Dresses Standing next to an African American Boy in a Hat. 1906. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 72. https://digital.library.emory.edu/purl/187pnvx0n0-cor.
APA, 6th edition
Two African American women in dresses standing next to an African American boy in a hat (Box 72). (1906). [Photographic postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/187pnvx0n0-cor.
Chicago
“Two African American Women in Dresses Standing next to an African American Boy in a Hat.” Photographic postcards. Robert Langmuir African American Photograph Collection, 1906. Box 72. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/187pnvx0n0-cor.