Armstrong, Walter Sinnott <br/><br/>
Understanding arguments :  an introduction to informal logic / 
Walter Sinnott-Armstrong, Robert Fogelin. 
 - 8th ed. 
 - Belmont, California :  Wadsworth Cencage Learning,  2010. 
 - 560 p. : ill. ; 23 cm 
<br/><br/> Includes index 
<br/><br/><label>ISBN: </label>9780495603962 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Logic