MLA
Emerson, G. A. Parris Island, S.C., Rapid Transit. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 75. https://digital.library.emory.edu/purl/931qfttf0z-cor.
APA, 6th edition
Emerson, G. A. Parris Island, S.C., rapid transit (Box 75) [Photographic postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/931qfttf0z-cor.
Chicago
Emerson, G. A. “Parris Island, S.C., Rapid Transit.” Photographic postcards. Robert Langmuir African American Photograph Collection, n.d. Box 75. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/931qfttf0z-cor.