MLA
Co., Detroit Photographic. John Brown's Grave, North Elba, Adirondack Mountains. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 69. https://digital.library.emory.edu/purl/866vx0k6ht-cor.
APA, 6th edition
Co., D. P. John Brown's grave, North Elba, Adirondack Mountains (Box 69) [Photographic postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/866vx0k6ht-cor.
Chicago
Co., Detroit Photographic. “John Brown's Grave, North Elba, Adirondack Mountains.” Photographic postcards. Robert Langmuir African American Photograph Collection, n.d. Box 69. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/866vx0k6ht-cor.