Fogelin, R. J. (2001). Understanding arguments: An introduction to informal logic. Fort Worth, TX: Harcourt College Publishers.
Trích dẫn kiểu ChicagoFogelin, Robert J. Understanding Arguments: An Introduction to Informal Logic. Fort Worth, TX: Harcourt College Publishers, 2001.
Deismireacht MLAFogelin, Robert J. Understanding Arguments: An Introduction to Informal Logic. Fort Worth, TX: Harcourt College Publishers, 2001.
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