Walton, Douglas N <br/><br/>
Informal logic : a pragmatic approach 
Douglas Walton 
 - 2nd ed 
 - Cambridge  Cambridge University Press  2008 
 - xvi, 347 p. : ill. ; 23 cm 
<br/><br/> Includes bibliographical references and index 
<br/><br/><label>ISBN: </label>9780521713801 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Logic<br/>Reasoning
<br/><br/><label>Dewey Class. No.: </label>168 WAL