Williams, B. A. O. (1993). Morality: An introduction to ethics (Canto ed.). Cambridge University Press.
Lua i Stíl Chicago (17ú heag.)Williams, Bernard Arthur Owen. Morality: An Introduction to Ethics. Canto ed. Cambridge ; New York: Cambridge University Press, 1993.
Lua MLA (8ú heag.)Williams, Bernard Arthur Owen. Morality: An Introduction to Ethics. Canto ed. Cambridge University Press, 1993.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.