Singer, P. (2000). A Darwinian Left: Politics, evolution, and cooperation. Yale University Press.
芝加哥风格引文Singer, Peter. A Darwinian Left: Politics, Evolution, and Cooperation. New Haven: Yale University Press, 2000.
MLA引文Singer, Peter. A Darwinian Left: Politics, Evolution, and Cooperation. Yale University Press, 2000.
警告：这些引文格式不一定是100％准确.