MLA
Gardens, Callaway. Business School - Group of People Talking by Window. 1967. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 8, Folder 2. https://digital.library.emory.edu/purl/726xwdbsj0-cor.
APA, 6th edition
Gardens, C. (1967). Business School - Group of people talking by window (Box 8, Folder 2) [Black-and-white photographs]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/726xwdbsj0-cor.
Chicago
Gardens, Callaway. “Business School - Group of People Talking by Window.” Black-and-white photographs. Emory University Office of Alumni Publications Photographs, 1967. Box 8, Folder 2. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/726xwdbsj0-cor.