MLA
Livingston, Arthur. Southern Pines, N.C. : a Four Flush Queen High ; the Black Diamond Express. 1912. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 75. https://digital.library.emory.edu/purl/27312jm663-cor.
APA, 6th edition
Livingston, A. (1912). Southern Pines, N.C. : a four flush queen high ; the Black Diamond Express (Box 75) [Postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/27312jm663-cor.
Chicago
Livingston, Arthur. “Southern Pines, N.C. : a Four Flush Queen High ; the Black Diamond Express.” Postcards. Robert Langmuir African American Photograph Collection, 1912. Box 75. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/27312jm663-cor.