Office of the Historian, Foreign Service Institute. "Kingdom of Serbia/Yugoslavia". A Guide to the United States' History of Recognition, Diplomatic, and Consular Relations, by Country, since 1776. United States Department of State. Archived from the original on February 11, 2010. Retrieved July 14, 2020.
Office of the Historian, Foreign Service Institute. "Kingdom of Serbia/Yugoslavia". A Guide to the United States' History of Recognition, Diplomatic, and Consular Relations, by Country, since 1776. United States Department of State. Archived from the original on February 11, 2010. Retrieved July 14, 2020.