MLA
Cotton Picking, Camden, S.C. : Four African American Boys Picking Cotton with Bags over Their Shoulders [Hand Colored]. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 68. https://digital.library.emory.edu/purl/296wwpzgqm-cor.
APA, 6th edition
Cotton picking, Camden, S.C. : four African American boys picking cotton with bags over their shoulders [hand colored] (Box 68). [Postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/296wwpzgqm-cor.
Chicago
“Cotton Picking, Camden, S.C. : Four African American Boys Picking Cotton with Bags over Their Shoulders [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/296wwpzgqm-cor.