MLA
Co., E. C. Kropp. Loading Cotton : Men Pushing Cotton up a Boat Ramp [Hand Colored]. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 68. https://digital.library.emory.edu/purl/3418kprr84-cor.
APA, 6th edition
Co., E. C. K. Loading cotton : men pushing cotton up a boat ramp [hand colored] (Box 68) [Postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/3418kprr84-cor.
Chicago
Co., E. C. Kropp. “Loading Cotton : Men Pushing Cotton up a Boat Ramp [Hand Colored].” 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/3418kprr84-cor.