YIN, Robert .K <br/><br/>
Case study research design and methods / 
Robert .K Yin 
 - London  Sage publications  c1989 
 - 166p.:  ill.; 
<br/><br/> include bibliographical references and index 
<br/><br/><label>ISBN: </label>0803934718 
<br/><br/><label>Dewey Class. No.: </label>300.72 YIN