ebrary, Inc, Centi, B., & Huemer, W. (2009). Values and ontology: Problems and perspectives. Ontos Verlag.
芝加哥风格引文ebrary, Inc, Beatrice Centi, 与 Wolfgang Huemer. Values and Ontology: Problems and Perspectives. Frankfurt: Ontos Verlag, 2009.
MLA引文ebrary, Inc, et al. Values and Ontology: Problems and Perspectives. Ontos Verlag, 2009.
警告：这些引文格式不一定是100％准确.