MLA
Hutchinson, H. S., and Co. Harvest Time at the City Farm : Clark's Point : African American Men Harvesting Grain Using Horse Drawn Carts. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 68. https://digital.library.emory.edu/purl/013mw6m931-cor.
APA, 6th edition
Hutchinson, H. S., & C. Harvest time at the city farm : Clark's Point : African American men harvesting grain using horse drawn carts (Box 68) [Postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/013mw6m931-cor.
Chicago
Hutchinson, H.S., and Co. “Harvest Time at the City Farm : Clark's Point : African American Men Harvesting Grain Using Horse Drawn Carts.” 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/013mw6m931-cor.