Cita APA (7th ed.)
Thomas, A., Regan, R. J., & Davies, B. (2003). On evil. Oxford University Press.
Cita Chicago (17th ed.)
Thomas, Aquinas, Richard J. Regan, i Brian Davies. On Evil. Oxford ; New York: Oxford University Press, 2003.
Cita MLA (9th ed.)
Thomas, Aquinas, et al. On Evil. Oxford University Press, 2003.
Atenció: Aquestes cites poden no estar 100% correctes.