Harman, G. (1977). The nature of morality: An introduction to ethics. Oxford University Press.
芝加哥风格引文Harman, Gilbert. The Nature of Morality: An Introduction to Ethics. New York: Oxford University Press, 1977.
MLA引文Harman, Gilbert. The Nature of Morality: An Introduction to Ethics. Oxford University Press, 1977.
警告：这些引文格式不一定是100％准确.