MLA
Hess, James E. Stevens House, Lancaster, Pa. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 74. https://digital.library.emory.edu/purl/532d7wm3b8-cor.
APA, 6th edition
Hess, J. E. Stevens House, Lancaster, Pa. (Box 74) [Photographic postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/532d7wm3b8-cor.
Chicago
Hess, James E. “Stevens House, Lancaster, Pa.” Photographic 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/532d7wm3b8-cor.