George, R. P. (1992). Natural law theory: Contemporary essays. Clarendon Press.
芝加哥风格引文George, Robert P. Natural Law Theory: Contemporary Essays. Oxford [England]: Clarendon Press, 1992.
MLA引文George, Robert P. Natural Law Theory: Contemporary Essays. Clarendon Press, 1992.
警告：这些引文格式不一定是100％准确.