Hospers, J. (1972). Human conduct: Problems of ethics. Harcourt Brace Jovanovich.
芝加哥风格引文Hospers, John. Human Conduct: Problems of Ethics. New York: Harcourt Brace Jovanovich, 1972.
MLA引文Hospers, John. Human Conduct: Problems of Ethics. Harcourt Brace Jovanovich, 1972.
警告：这些引文格式不一定是100％准确.