Velleman, J. D. (2013). Foundations for moral relativism. Open Book Publishers.
芝加哥风格引文Velleman, J. David. Foundations for Moral Relativism. Cambridge: Open Book Publishers, 2013.
MLA引文Velleman, J. David. Foundations for Moral Relativism. Open Book Publishers, 2013.
警告：这些引文格式不一定是100％准确.