MLA
Black Diamond : the Champ Boxer UN, Navy. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 74. https://digital.library.emory.edu/purl/064tht76mb-cor.
APA, 6th edition
Black Diamond : the champ boxer UN, Navy (Box 74). [Postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/064tht76mb-cor.
Chicago
“Black Diamond : the Champ Boxer UN, Navy.” Postcards. Robert Langmuir African American Photograph Collection, n.d. Box 74. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/064tht76mb-cor.