MLA
Two Men Boxing, One of Them African American : with a Crowd of Men Watching. 1917. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 74. https://digital.library.emory.edu/purl/7440rxwdf5-cor.
APA, 6th edition
Two men boxing, one of them African American : with a crowd of men watching (Box 74). (1917). [Postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/7440rxwdf5-cor.
Chicago
“Two Men Boxing, One of Them African American : with a Crowd of Men Watching.” Postcards. Robert Langmuir African American Photograph Collection, 1917. Box 74. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/7440rxwdf5-cor.