Wardhaugh, Ronald <br/><br/>
An introduction to socio-linguistics 
/ Ronald Wardhaugh 
. - Oxford  New york  : B.blackwell, 1986
. - 384 p.  ; 23 cm. 
<br/><br/>Bibliogr, index 
<br/><br/><label>ISBN: </label>063114272X 
<br/><br/><label>Source: </label> Don britanique 
<br/><br/><label>Universal Decimal Class. No.: </label>800.1