एपीए उद्धरण

Richter, D., & Duncan Richter. (2008). Why be good?: A historical introduction to ethics. New York: Oxford University Press.

शिकागो स्टाइल उद्धरण

Richter, Duncan, और Duncan Richter. Why Be Good?: A Historical Introduction to Ethics. New York: Oxford University Press, 2008.

एमएलए उद्धरण

Richter, Duncan, और Duncan Richter. Why Be Good?: A Historical Introduction to Ethics. New York: Oxford University Press, 2008.