Gore, A. (1993). Earth in the Balance: Ecology and the human spirit. Penguin Books.
芝加哥风格引文Gore, Albert. Earth in the Balance: Ecology and the Human Spirit. New York: Penguin Books, 1993.
MLA引文Gore, Albert. Earth in the Balance: Ecology and the Human Spirit. Penguin Books, 1993.
警告：这些引文格式不一定是100％准确.