MLA
Three African American Women and Three African American Men Picking Cotton in a Field. 1910. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 68. https://digital.library.emory.edu/purl/0515mkkwm7-cor.
APA, 6th edition
Three African American women and three African American men picking cotton in a field (Box 68). (1910). [Postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/0515mkkwm7-cor.
Chicago
“Three African American Women and Three African American Men Picking Cotton in a Field.” Postcards. Robert Langmuir African American Photograph Collection, 1910. Box 68. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/0515mkkwm7-cor.