Gerring, John <br/><br/>
Case study research :  principles and practices / 
John Gerring 
 - New York :  Cambridge University Press,  2007 
 - x, 265 p. ;  24 cm. 
<br/><br/><label>ISBN: </label>9780621859288 052185928X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social sciences--Research--Methodology<br/>Case method