Himmelmann, B., & Louden, R. B. (2015). Why be moral? De Gruyter.
Cita Chicago (17th ed.)Himmelmann, Beatrix, i Robert B. Louden. Why Be Moral? Berlin, [Germany] ; Boston, [Massachusetts]: De Gruyter, 2015.
Cita MLA (9th ed.)Himmelmann, Beatrix, i Robert B. Louden. Why Be Moral? De Gruyter, 2015.
Atenció: Aquestes cites poden no estar 100% correctes.