Kupperman, J. (2007). Ethics and qualities of life. Oxford University Press.
Lua i Stíl Chicago (17ú heag.)Kupperman, Joel. Ethics and Qualities of Life. New York: Oxford University Press, 2007.
Lua MLA (8ú heag.)Kupperman, Joel. Ethics and Qualities of Life. Oxford University Press, 2007.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.