MLA
University Bookstore - Students Waiting in Line Outside of Building. 1940. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 1, Folder 2. https://digital.library.emory.edu/purl/24947d7x53-cor.
APA, 6th edition
University Bookstore - Students waiting in line outside of building (Box 1, Folder 2). (1940). [Black-and-white photographs]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/24947d7x53-cor.
Chicago
“University Bookstore - Students Waiting in Line Outside of Building.” Black-and-white photographs. Emory University Office of Alumni Publications Photographs, 1940. Box 1, Folder 2. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/24947d7x53-cor.