Kupperman, J. (2007). Ethics and qualities of life. Oxford University Press.
Chicago Style aipamenaKupperman, Joel. Ethics and Qualities of Life. New York: Oxford University Press, 2007.
MLA aipamenaKupperman, Joel. Ethics and Qualities of Life. Oxford University Press, 2007.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.