MLA
Duncan, Bob. Affirmation Vietnam - Two Women Stand by Sign. 1966. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 6, Folder 1. https://digital.library.emory.edu/purl/699n2z35fr-cor.
APA, 6th edition
Duncan, B. (1966). Affirmation Vietnam - Two women stand by sign (Box 6, Folder 1) [Black-and-white photographs]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/699n2z35fr-cor.
Chicago
Duncan, Bob. “Affirmation Vietnam - Two Women Stand by Sign.” Black-and-white photographs. Emory University Office of Alumni Publications Photographs, 1966. Box 6, Folder 1. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/699n2z35fr-cor.