MLA
Dunn, Owen G. A Cotton Picking, New Bern, North Carolina. 1906. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 68. https://digital.library.emory.edu/purl/423612jm99-cor.
APA, 6th edition
Dunn, O. G. (1906). A cotton picking, New Bern, North Carolina (Box 68) [Photographic postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/423612jm99-cor.
Chicago
Dunn, Owen G. “A Cotton Picking, New Bern, North Carolina.” Photographic postcards. Robert Langmuir African American Photograph Collection, 1906. Box 68. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/423612jm99-cor.