MLA
Co., E. C. Kropp. State Hospital for Colored People, Goldsboro, North Carolina. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 70. https://digital.library.emory.edu/purl/931qfttf1w-cor.
APA, 6th edition
Co., E. C. K. State Hospital for Colored People, Goldsboro, North Carolina (Box 70) [Postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/931qfttf1w-cor.
Chicago
Co., E. C. Kropp. “State Hospital for Colored People, Goldsboro, North Carolina.” Postcards. Robert Langmuir African American Photograph Collection, n.d. Box 70. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/931qfttf1w-cor.