Hargrove, E. C. (1989). Foundations of environmental ethics. Prentice-Hall.
芝加哥风格引文Hargrove, Eugene C. Foundations of Environmental Ethics. Englewood Cliffs, NJ: Prentice-Hall, 1989.
MLA引文Hargrove, Eugene C. Foundations of Environmental Ethics. Prentice-Hall, 1989.
警告：这些引文格式不一定是100％准确.