Copi, Irving M.\\ &   Cohen Carl.  <br/><br/>
Introduction to logic\\\  .\\ 
Irving M. Copi & Carl Cohen. 
 - 13th ed. 
 - Delhi  pearson.  2009 
 - 670p. 
<br/><br/>Includes index(649-670). 
<br/><br/><label>ISBN: </label>9788131720745 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Philosophy,logic.
<br/><br/><label>Dewey Class. No.: </label>160/C776i