APA citiranje

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

Trích dẫn kiểu Chicago

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

MLA citiranje

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