MLA
News, Emory University, and Publications Bureau. Military: Emory Units, World War I and II - Quartet Singing. 1946. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 24, Folder 5. https://digital.library.emory.edu/purl/6623bk3k7d-cor.
APA, 6th edition
News, E. U., & Bureau, P. (1946). Military: Emory Units, World War I and II - Quartet singing (Box 24, Folder 5) [Black-and-white photographs]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/6623bk3k7d-cor.
Chicago
News, Emory University, and Publications Bureau. “Military: Emory Units, World War I and II - Quartet Singing.” Black-and-white photographs. EU Office of Alumni Publications Photos Deposit Collection 2 , 1946. Box 24, Folder 5. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/6623bk3k7d-cor.