MLA
Co., J. P. Bell. Dining Pavilion at Great Falls of the Potomac : with Two African American Waiters. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 74. https://digital.library.emory.edu/purl/996k0p2nk8-cor.
APA, 6th edition
Co., J. P. B. Dining pavilion at Great Falls of the Potomac : with two African American waiters (Box 74) [Postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/996k0p2nk8-cor.
Chicago
Co., J.P. Bell. “Dining Pavilion at Great Falls of the Potomac : with Two African American Waiters.” Postcards. Robert Langmuir African American Photograph Collection, n.d. Box 74. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/996k0p2nk8-cor.