MLA
Threshing Rice in Arkansas, along the Cotton Belt Route : [African Americans Using Machinery to Thresh Rice into Horse Drawn Wagons] [Hand Colored]. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 68. https://digital.library.emory.edu/purl/334fn2z37z-cor.
APA, 6th edition
Threshing rice in Arkansas, along the cotton belt route : [African Americans using machinery to thresh rice into horse drawn wagons] [hand colored] (Box 68). [Postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/334fn2z37z-cor.
Chicago
“Threshing Rice in Arkansas, along the Cotton Belt Route : [African Americans Using Machinery to Thresh Rice into Horse Drawn Wagons] [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/334fn2z37z-cor.