Wardhaugh, Ronald. <br/><br/>
An introduction to sociolinguistics / 
Ronald Wardhaugh. 
 - 5th ed. 
 - Malden, MA. :  Blackwell Pub.,  2006. 
 - vi, 418 p. ;  25 cm. 
 - Blackwell textbooks in linguistics ;  4. .
<br/><br/>Includes bibliographical references and index. 
<br/><br/>
<br/><br/><label>ISBN: </label>140513559X (pbk.)  RM138.93 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Sociolinguistics.