APA
Williams Bernard,, . (1972). Morality : An introduction to ethics. Cambridge: Cambridge University Press.
Chicago
Williams Bernard,, . 1972. Morality : An introduction to ethics. Cambridge: Cambridge University Press.
Harvard
Williams Bernard,, . (1972). Morality : An introduction to ethics. Cambridge: Cambridge University Press.
MLA
Williams Bernard,, . Morality : An introduction to ethics. Cambridge: Cambridge University Press. 1972.