MLA
Heiss, W. R. Two African American Boxers in the United States Navy with Others Watching. 1905. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 74. https://digital.library.emory.edu/purl/8708w9gj0t-cor.
APA, 6th edition
Heiss, W. R. (1905). Two African American boxers in the United States Navy with others watching (Box 74) [Postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/8708w9gj0t-cor.
Chicago
Heiss, W. R. “Two African American Boxers in the United States Navy with Others Watching.” Postcards. Robert Langmuir African American Photograph Collection, 1905. Box 74. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/8708w9gj0t-cor.