Paley, W. (2002). The principles of moral and political philosophy. Liberty Fund.
芝加哥风格引文Paley, William. The Principles of Moral and Political Philosophy. Indianapolis, Ind.: Liberty Fund, 2002.
MLA引文Paley, William. The Principles of Moral and Political Philosophy. Liberty Fund, 2002.
警告：这些引文格式不一定是100％准确.