Copi, Irving M. <br/><br/>
Introduction to logic / 
by Irving M. Copi 
 - 7th ed. 
 - New York :  MacMillan,  1986. 
 - 617 p. :  ill. ;  24 cm. 
<br/><br/><label>ISBN: </label>0023250208 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Logic.