Paulsen, F. (1899). System of ethics. Charles Scribner.
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Chicago Style (17th ed.) Citation
Paulsen, Friedrich. System of Ethics. New York: Charles Scribner, 1899.
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MLA引文
Paulsen, Friedrich. System of Ethics. Charles Scribner, 1899.
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警告：這些引文格式不一定是100％准確.