ebrary, Inc, Horn, C., Schönecker, D., & Mieth, C. (2006). Groundwork for the metaphysics of morals. Walter de Gruyter.
芝加哥风格引文ebrary, Inc, Christoph Horn, Dieter Schönecker, 与 Corinna Mieth. Groundwork for the Metaphysics of Morals. Berlin ; New York: Walter de Gruyter, 2006.
MLA引文ebrary, Inc, et al. Groundwork for the Metaphysics of Morals. Walter de Gruyter, 2006.
警告：这些引文格式不一定是100％准确.