MLA
African American Man, Woman and Children Picking Cotton in a Field, on a Plantation in Arkansas. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 68. https://digital.library.emory.edu/purl/969866t1kn-cor.
APA, 6th edition
African American man, woman and children picking cotton in a field, on a plantation in Arkansas (Box 68). [Photographic postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/969866t1kn-cor.
Chicago
“African American Man, Woman and Children Picking Cotton in a Field, on a Plantation in Arkansas.” Photographic 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/969866t1kn-cor.