Wardhaugh, Ronald  . <br/><br/>
Introduction to sociolinguistics /  
by Ronald Wardhaugh. 
 - 3rd ed /  
 - Malden :   Blackwell Publishing ,   1986 
 - 404p ;  
<br/><br/><label>ISBN: </label>0-631-20499-7 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Sociolinguistics
<br/><br/><label>Dewey Class. No.: </label>POb  / M6;1