Gumperz,  J. J. <br/><br/>
Directions in social linguistics:the ethnography of communicaion. 

 - New York  Holt Rinehart and Winston Inc.  1972 
 - x,598p  22cm 
<br/><br/><label>ISBN: </label>0-03-077745-3 
<br/><br/><label>LC Class. No.: </label>P41.G79