MLA
News, and Publications Bureau. Faculty and Staff, Unidentified Individuals - Man Sitting in Grass. 1940. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 14, Folder 3. https://digital.library.emory.edu/purl/037hqbzm6k-cor.
APA, 6th edition
N., & Bureau, P. (1940). Faculty and staff, unidentified individuals - Man sitting in grass (Box 14, Folder 3) [Black-and-white photographs]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/037hqbzm6k-cor.
Chicago
News, and Publications Bureau. “Faculty and Staff, Unidentified Individuals - Man Sitting in Grass.” Black-and-white photographs. EU Office of Alumni Publications Photos Deposit Collection 1, 1940. Box 14, Folder 3. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/037hqbzm6k-cor.