Copi, Irving M. <br/><br/>Introduction to logic / Irving M. Copi and Carl Cohen.   -- 13th ed.  -- Singapore:  Pearson Education South Asia Pte Ltd.,  2009.  <br/>xvii, 670 p. ;  ill.  23 cm. <br/><br/> Includes index. <br/><br/><label>ISBN: </label>9789810697563 <br/><br/><label>Subjects--Topical Terms: </label><br/>Logic.<br/><br/><label>Dewey Class. No.: </label>Res 160 C7911 2009