MLA
Co., National Art Service. Slave Quarters, Lee Mansion, Arlington National Cemetery. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 74. https://digital.library.emory.edu/purl/808v9s4mzk-cor.
APA, 6th edition
Co., N. A. S. Slave quarters, Lee Mansion, Arlington National Cemetery (Box 74) [Postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/808v9s4mzk-cor.
Chicago
Co., National Art Service. “Slave Quarters, Lee Mansion, Arlington National Cemetery.” 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/808v9s4mzk-cor.