Easton, S. M. (1994). The problem of pornography: Regulation and the right to free speech. Routledge.
芝加哥风格引文Easton, Susan M. The Problem of Pornography: Regulation and the Right to Free Speech. London ; New York: Routledge, 1994.
MLA引文Easton, Susan M. The Problem of Pornography: Regulation and the Right to Free Speech. Routledge, 1994.
警告：这些引文格式不一定是100％准确.