MLA
Bros., Smith, and Co. Men and Women Cutting and Gathering Sugarcane in a Field. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 68. https://digital.library.emory.edu/purl/105s7h44mz-cor.
APA, 6th edition
Bros., S., & C. Men and women cutting and gathering sugarcane in a field (Box 68) [Postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/105s7h44mz-cor.
Chicago
Bros., Smith, and Co. “Men and Women Cutting and Gathering Sugarcane in a Field.” Postcards. Robert Langmuir African American Photograph Collection, n.d. Box 68. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/105s7h44mz-cor.