Hofferbert, R. I. (1974). The study of public policy. Bobbs-Merrill.
芝加哥风格引文Hofferbert, Richard I. The Study of Public Policy. New York: Bobbs-Merrill, 1974.
MLA引文Hofferbert, Richard I. The Study of Public Policy. Bobbs-Merrill, 1974.
警告：这些引文格式不一定是100％准确.