Singer, P. (1981). The expanding circle: Ethics and sociobiology. Farrar, Straus Giroux.
Chicago Style (17th ed.) CitationSinger, Peter. The Expanding Circle: Ethics and Sociobiology. New York, NY: Farrar, Straus Giroux, 1981.
MLA (9th ed.) CitationSinger, Peter. The Expanding Circle: Ethics and Sociobiology. Farrar, Straus Giroux, 1981.
Warning: These citations may not always be 100% accurate.