Yin, Robert K., <br/><br/>
Case study research : design and methods 

 - 4th ed. 
 - London  Sage Publications  2009 
 - xiv, 219 p.:  ill.;  23 cm. 
 - Applied social research methods series ; 5. .
<br/><br/> Formerly CIP.  
<br/><br/><label>ISBN: </label>9781412960991 
<br/><br/><label>Dewey Class. No.: </label>300.722 YIN