Hudson, W. D. (1983). Modern moral philosophy (2. ed.). St. Martin's Press.
芝加哥风格引文Hudson, W. D. Modern Moral Philosophy. 2. ed. New York: St. Martin's Press, 1983.
MLA引文Hudson, W. D. Modern Moral Philosophy. 2. ed. St. Martin's Press, 1983.
警告：这些引文格式不一定是100％准确.