Schmidt, S. W., & Shelley, M. C. (1991). American government and politics today. West.
芝加哥风格引文Schmidt, Steffen W., 与 Mack C. Shelley. American Government and Politics Today. Saint Paul: West, 1991.
MLA引文Schmidt, Steffen W., 与 Mack C. Shelley. American Government and Politics Today. West, 1991.
警告：这些引文格式不一定是100％准确.