MLA
Ashton, A. R. African American Men and Women Posing on Stage in Rockhead's Paradise, with Musical Instruments Set up behind Them. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 70. https://digital.library.emory.edu/purl/351hhmgqrr-cor.
APA, 6th edition
Ashton, A. R. African American men and women posing on stage in Rockhead's Paradise, with musical instruments set up behind them (Box 70) [Photographic postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/351hhmgqrr-cor.
Chicago
Ashton, A. R. “African American Men and Women Posing on Stage in Rockhead's Paradise, with Musical Instruments Set up behind Them.” Photographic postcards. Robert Langmuir African American Photograph Collection, n.d. Box 70. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/351hhmgqrr-cor.