MLA
Valentine, and Sons. At the Hermitage, Savannah, Ga. 1910. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 74. https://digital.library.emory.edu/purl/146qz612mg-cor.
APA, 6th edition
V., & S. (1910). At the hermitage, Savannah, Ga. (Box 74) [Postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/146qz612mg-cor.
Chicago
Valentine, and Sons. “At the Hermitage, Savannah, Ga.” Postcards. Robert Langmuir African American Photograph Collection, 1910. Box 74. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/146qz612mg-cor.