MLA
Unknown, Class Picture, To an Unselfish End We Aspire, 1921. 1921. Stuart A. Rose Manuscript, Archives, and Rare Book Library, OP45. https://digital.library.emory.edu/purl/098z8w9gk2-cor.
APA, 6th edition
Unknown, class picture, To an unselfish end we aspire, 1921 (OP45). (1921). [Black-and-white photographs]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/098z8w9gk2-cor.
Chicago
“Unknown, Class Picture, To an Unselfish End We Aspire, 1921.” Black-and-white photographs. Robert Langmuir African American Photograph Collection, 1921. OP45. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/098z8w9gk2-cor.