MLA
Bour, Eric. Library - Lady Gregory from the Yeats Collection. 1979. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 1, Folder 10. https://digital.library.emory.edu/purl/873pvmcw08-cor.
APA, 6th edition
Bour, E. (1979). Library - Lady Gregory from the Yeats Collection (Box 1, Folder 10) [Black-and-white photographs]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/873pvmcw08-cor.
Chicago
Bour, Eric. “Library - Lady Gregory from the Yeats Collection.” Black-and-white photographs. Emory University Office of Alumni Publications Photographs, 1979. Box 1, Folder 10. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/873pvmcw08-cor.