Yin, Robert K. <br/><br/>
Case study research   :Design and methods/2nd ed. 

 - 2nd ed. 
 - New Delhi  Sage Publications  1994 
 -    
<br/><br/><label>Subjects--Index Terms: </label>Designing case studies 
<br/><br/><label>Dewey Class. No.: </label>001.432