MLA
Co., E. C. Kropp. Ostrich Farm : African American Man Driving an Ostrich-Pulled Cart. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 73. https://digital.library.emory.edu/purl/767wm37pzd-cor.
APA, 6th edition
Co., E. C. K. Ostrich farm : African American man driving an ostrich-pulled cart (Box 73) [Photographic postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/767wm37pzd-cor.
Chicago
Co., E. C. Kropp. “Ostrich Farm : African American Man Driving an Ostrich-Pulled Cart.” Photographic postcards. Robert Langmuir African American Photograph Collection, n.d. Box 73. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/767wm37pzd-cor.