MLA
Cheyne. Armstrong and Slater Memorial Trade School, Hampton Institute, Hampton, Virginia. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 70. https://digital.library.emory.edu/purl/13331zcrnw-cor.
APA, 6th edition
C. Armstrong and Slater Memorial Trade School, Hampton Institute, Hampton, Virginia (Box 70) [Photographic postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/13331zcrnw-cor.
Chicago
Cheyne. “Armstrong and Slater Memorial Trade School, Hampton Institute, Hampton, Virginia.” 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/13331zcrnw-cor.