Gunther, J. (1950). Roosevelt in retrospect: A profile in history / John Gunther. Harper.
Citazione stile Chigago Style (17a edizione)Gunther, John. Roosevelt in Retrospect: A Profile in History / John Gunther. New York: Harper, 1950.
Citatione MLA (8a ed.)Gunther, John. Roosevelt in Retrospect: A Profile in History / John Gunther. Harper, 1950.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.