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

 - 3rd ed. 
 -  London , Sage publications  2003 
 - xvi, 181 p. : ill. ; 22 cm. 
 - Applied social research methods series ; v. 5 .
<br/><br/><label>ISBN: </label>9780761925521 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social sciences - Research - Methodology.