William Labov <br/><br/>
Principles of Linguistic Change  Internal Factors  20  Language in Society 20 

 - Oxford, Cambridge  Blackwell Publishers  1994, Reprinted 1995, 1999 
 -  Volume 1 .
<br/><br/><label>ISBN: </label>978-0-631-17914-6 
<br/><br/><label>Dewey Class. No.: </label>417.1LABP(1)