MLA
Wittemann, A. Three African American Boys on a Stone Bridge in Hot Springs, Virginia. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 72. https://digital.library.emory.edu/purl/938jdfn319-cor.
APA, 6th edition
Wittemann, A. Three African American boys on a stone bridge in Hot Springs, Virginia (Box 72) [Postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/938jdfn319-cor.
Chicago
Wittemann, A. “Three African American Boys on a Stone Bridge in Hot Springs, Virginia.” Postcards. Robert Langmuir African American Photograph Collection, n.d. Box 72. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/938jdfn319-cor.