Krug/Schlüter <br/><br/>
Research Methods in Language Variation and Change 

 - 1st Ed 
 -  Cambridge University Press  2014 
<br/><br/><label>ISBN: </label>9780511792519 
<br/><br/><label>Source: </label>EBOOK 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Linguistics