Yin, Robert K. <br/><br/>
Case study research :  design and methods / 
Robert K. Yin. 
 - 2nd ed. 
 - London :  Sage,  1994. 
 - (171)p ;  23 cm. 
 - Applied Social Research Methods Series ;  Volume 5 .
<br/><br/><label>ISBN: </label>0803956630  £12.50 9780803956636 
<br/><br/><label>Nat. Bib. No.: </label>GB94Y5488  bnb