Cita APA (7th ed.)
Frankena, W. K. (2015). Ethics (2nd ed.). Prentice Hall.
Cita Chicago (17th ed.)
Frankena, William K. Ethics. 2nd ed. New Delhi: Prentice Hall, 2015.
Cita MLA (9th ed.)
Frankena, William K. Ethics. 2nd ed. Prentice Hall, 2015.
Atenció: Aquestes cites poden no estar 100% correctes.