William Fleming (1890). Vocabulary of Philosophy: Moral, Ethical, Metaphysical. TORRE DE BABEL EDICIONES Philosophy, Psychology and Humanities Web Site. [3 January 2015]. (原始内容存档于2021-01-26).引用错误:带有name属性“fleming”的<ref>标签用不同内容定义了多次
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William Fleming (1890). Vocabulary of Philosophy: Moral, Ethical, Metaphysical. TORRE DE BABEL EDICIONES Philosophy, Psychology and Humanities Web Site. [3 January 2015]. (原始内容存档于2021-01-26).引用错误:带有name属性“fleming”的<ref>标签用不同内容定义了多次