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.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.