Wardhaugh, Ronald. <br/><br/>
Introduction to linguistics 
Ronald Wardhaugh. 
 - 2nd ed. 
 - New York :  McGraw-Hill,  1977. 
 - viii, 268 p. ;  24 cm. 
<br/><br/> Includes index. 
<br/><br/>Bibliography: p. 255-261 
<br/><br/><label>ISBN: </label>007068152X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Linguistics.