TY  - BOOK
AU  - Yin,Robert K.
TI  - Case study research: design and methods 
SN  - 9781412960991
U1  - 300.722 
PY  - 2009///.
CY  - Los Angeles: 
PB  - Sage, 
KW  - Social sciences
KW  - Research
KW  - Methodology
N1  - Includes bibliographical references and index
ER  -