MLA
Four African American Men in Tuxedoes, Each Leaning over with Their Head against Another's. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 72. https://digital.library.emory.edu/purl/962f7m0cjj-cor.
APA, 6th edition
Four African American men in tuxedoes, each leaning over with their head against another's (Box 72). [Postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/962f7m0cjj-cor.
Chicago
“Four African American Men in Tuxedoes, Each Leaning over with Their Head against Another's.” Postcards. Robert Langmuir African American Photograph Collection, n.d. Box 72. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/962f7m0cjj-cor.