Himmelmann, B., & Louden, R. B. (2015). Why be moral? De Gruyter.
芝加哥风格引文Himmelmann, Beatrix, 与 Robert B. Louden. Why Be Moral? Berlin, [Germany] ; Boston, [Massachusetts]: De Gruyter, 2015.
MLA引文Himmelmann, Beatrix, 与 Robert B. Louden. Why Be Moral? De Gruyter, 2015.
警告：这些引文格式不一定是100％准确.