Blum, J. M. (1991). Years of discord: American politics and society, 1961-1974. W.W. Norton.
芝加哥风格引文Blum, John Morton. Years of Discord: American Politics and Society, 1961-1974. New York: W.W. Norton, 1991.
MLA引文Blum, John Morton. Years of Discord: American Politics and Society, 1961-1974. W.W. Norton, 1991.
警告：这些引文格式不一定是100％准确.