President Harry S. Truman enters Cecilienhof Palace to attend one of the meetings of the Potsdam Conference. L to R: Captain James K. Vardaman, President Truman, Secretary of State James Byrnes (background), and Gen. Harry Vaughan.

Chicago citation style
National Archives and Records Administration. Office of Presidential Libraries. Harry S. Truman Library. 4/1/1985. President Harry S. Truman enters Cecilienhof Palace to attend one of the meetings of the Potsdam Conference. L to R: Captain James K. Vardaman, President Truman, Secretary of State James Byrnes (background), and Gen. Harry Vaughan.. 1945-07-17. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/198773. (Accessed September 24, 2018.)
APA citation style
National Archives and Records Administration. Office of Presidential Libraries. Harry S. Truman Library. 4/1/1985, (1945-07-17) President Harry S. Truman enters Cecilienhof Palace to attend one of the meetings of the Potsdam Conference. L to R: Captain James K. Vardaman, President Truman, Secretary of State James Byrnes (background), and Gen. Harry Vaughan.. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/198773
MLA citation style
National Archives and Records Administration. Office of Presidential Libraries. Harry S. Truman Library. 4/1/1985. Retrieved from the Digital Public Library of America <http://catalog.archives.gov/id/198773>.
Note: These citations are programmatically generated and may be incomplete.