Cochran, C. E. (1990). American public policy: An introduction (3rd ed.). St. Martin's Press.
芝加哥风格引文Cochran, Clarke E. American Public Policy: An Introduction. 3rd ed. New York, NY: St. Martin's Press, 1990.
MLA引文Cochran, Clarke E. American Public Policy: An Introduction. 3rd ed. St. Martin's Press, 1990.
警告：这些引文格式不一定是100％准确.