MLA
McDougald, Worth. Students, Groups, 1940s-1950s - Students in Classroom. 1944. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 18, Folder 2. https://digital.library.emory.edu/purl/791sf7m151-cor.
APA, 6th edition
McDougald, W. (1944). Students, groups, 1940s-1950s - Students in classroom (Box 18, Folder 2) [Black-and-white photographs]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/791sf7m151-cor.
Chicago
McDougald, Worth. “Students, Groups, 1940s-1950s - Students in Classroom.” Black-and-white photographs. EU Office of Alumni Publications Photos Deposit Collection 1, 1944. Box 18, Folder 2. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/791sf7m151-cor.