Singer, P. (1983). The expanding circle: Ethics and sociobiology. Oxford University Press.
Chicago Edition CitationSinger, Peter. The Expanding Circle: Ethics and Sociobiology. Oxford [Oxfordshire]: Oxford University Press, 1983.
MLA Edition CitationSinger, Peter. The Expanding Circle: Ethics and Sociobiology. Oxford University Press, 1983.
Warning: These citations may not always be 100% accurate.