MLA
Soldier Sitting at a Table Using a Telegraph, with Other Soldiers and Men Standing around Him, in Port-Au-Prince, Haiti. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 70. https://digital.library.emory.edu/purl/000000003k-cor.
APA, 6th edition
Soldier sitting at a table using a telegraph, with other soldiers and men standing around him, in Port-au-Prince, Haiti (Box 70). [Photographic postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/000000003k-cor.
Chicago
“Soldier Sitting at a Table Using a Telegraph, with Other Soldiers and Men Standing around Him, in Port-Au-Prince, Haiti.” Photographic postcards. Robert Langmuir African American Photograph Collection, n.d. Box 70. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/000000003k-cor.