MLA
Century. 20th Anniversary Observance Dinner : National Urban League. 1930. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 56. https://digital.library.emory.edu/purl/675r7sqvh3-cor.
APA, 6th edition
C. (1930). 20th anniversary observance dinner : National Urban League (Box 56) [Card photographs (photographs)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/675r7sqvh3-cor.
Chicago
Century. “20th Anniversary Observance Dinner : National Urban League.” Card photographs (photographs). Robert Langmuir African American Photograph Collection, 1930. Box 56. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/675r7sqvh3-cor.