MLA
Weller, E. K. Negro Mountain on National Road, West of Grantsville, Md. 1908. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 71. https://digital.library.emory.edu/purl/9117m0cg15-cor.
APA, 6th edition
Weller, E. K. (1908). Negro Mountain on National Road, west of Grantsville, Md. (Box 71) [Postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/9117m0cg15-cor.
Chicago
Weller, E. K. “Negro Mountain on National Road, West of Grantsville, Md.” Postcards. Robert Langmuir African American Photograph Collection, 1908. Box 71. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/9117m0cg15-cor.