MLA
African American Man and Woman Posing in a Field of Cotton. 1907. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 68. https://digital.library.emory.edu/purl/863fxpnw1m-cor.
APA, 6th edition
African American man and woman posing in a field of cotton (Box 68). (1907). [Photographic postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/863fxpnw1m-cor.
Chicago
“African American Man and Woman Posing in a Field of Cotton.” Photographic postcards. Robert Langmuir African American Photograph Collection, 1907. Box 68. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/863fxpnw1m-cor.