* "Democracy and Disobedience", Clarendon Press, Oxford, 1973; Oxford University Press, New York, 1974; Gregg Revivals, Aldershot, Hampshire, 1994* "Practical Ethics", Cambridge University Press, Cambridge, 1980; second edition, 1993; third edition, 2011.
* "Democracy and Disobedience", Clarendon Press, Oxford, 1973; Oxford University Press, New York, 1974; Gregg Revivals, Aldershot, Hampshire, 1994* "Animal Rights and Human Obligations: An Anthology" (co-editor with Thomas Regan), Prentice-Hall, New Jersey, 1976.