APA (7th ed.) Citation

Singer, P. (1981). The expanding circle: Ethics and sociobiology (1. iss. as paperback.). Oxford University Press.

Chicago Style (17th ed.) Citation

Singer, Peter. The Expanding Circle: Ethics and Sociobiology. 1. iss. as paperback. Oxford [Oxfordshire]: Oxford University Press, 1981.

MLA (9th ed.) Citation

Singer, Peter. The Expanding Circle: Ethics and Sociobiology. 1. iss. as paperback. Oxford University Press, 1981.