Walton, Douglas <br/><br/>
Informal logic :  a pragmatic approach. 

 - 2 ed. 
 - Cambridge :  Cambridge University Press,  2008. 
 - 347 p. 
<br/><br/><label>ISBN: </label>9780521713801 
<br/><br/><label>Subjects--Topical Terms: </label><br/>DIALECTICA<br/>LOGICA<br/>RAZONAMIENTO
<br/><br/><label>Subjects--Facted Index Terms: </label><br/>FILOSOFIA