Gunther, J. (1950). Roosevelt in retrospect: A profile in history / John Gunther. Harper.
Chicago-Zitierstil (17. Ausg.)Gunther, John. Roosevelt in Retrospect: A Profile in History / John Gunther. New York: Harper, 1950.
MLA-Zitierstil (8. Ausg.)Gunther, John. Roosevelt in Retrospect: A Profile in History / John Gunther. Harper, 1950.
警告：這些引文格式不一定是100％准確.