Gallup, G. H. (1972). The Gallup Poll: Public opinion, 1935-1971. Random House.
芝加哥风格引文Gallup, George Horace. The Gallup Poll: Public Opinion, 1935-1971. New York: Random House, 1972.
MLA引文Gallup, George Horace. The Gallup Poll: Public Opinion, 1935-1971. Random House, 1972.
警告：这些引文格式不一定是100％准确.