The state of the language 
/ ed. by Leonard Michaels 
. - London  : University of Californie press, 1980
. - 609 p.  ; 23 cm. 
<br/><br/><label>ISBN: </label>0520044002 
<br/><br/><label>Source: </label> Don britannique 
<br/><br/><label>Universal Decimal Class. No.: </label>802.0.