MLA
Merrow, E. L. Cotton Picking : African American Men and Women Picking Cotton with Onlookers. 1910. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 68. https://digital.library.emory.edu/purl/221tdz08pz-cor.
APA, 6th edition
Merrow, E. L. (1910). Cotton picking : African American men and women picking cotton with onlookers (Box 68) [Photographic postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/221tdz08pz-cor.
Chicago
Merrow, E. L. “Cotton Picking : African American Men and Women Picking Cotton with Onlookers.” Photographic postcards. Robert Langmuir African American Photograph Collection, 1910. Box 68. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/221tdz08pz-cor.