L to R: President Harry S. Truman, Secretary of State James Byrnes, and Ambassador to Belgium Charles Sawyer in a car after President Truman and Secretary of State Byrnes arrived in Antwerp, Belgium en route to Germany to attend the Potsdam Conference.

Chicago citation style
National Archives and Records Administration. Office of Presidential Libraries. Harry S. Truman Library. 4/1/1985. L to R: President Harry S. Truman, Secretary of State James Byrnes, and Ambassador to Belgium Charles Sawyer in a car after President Truman and Secretary of State Byrnes arrived in Antwerp, Belgium en route to Germany to attend the Potsdam Conference.. 1945-07-15. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/198783. (Accessed October 23, 2018.)
APA citation style
National Archives and Records Administration. Office of Presidential Libraries. Harry S. Truman Library. 4/1/1985, (1945-07-15) L to R: President Harry S. Truman, Secretary of State James Byrnes, and Ambassador to Belgium Charles Sawyer in a car after President Truman and Secretary of State Byrnes arrived in Antwerp, Belgium en route to Germany to attend the Potsdam Conference.. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/198783
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/198783>.
Note: These citations are programmatically generated and may be incomplete.