TY  - BOOK
AU  - Yin,Robert K.
TI  - Case stury research: design and methjods 
SN  - 1412960991 :
PY  - 2009///
CY  - London
PB  - SAGE
KW  - CASE method
KW  - Social science
KW  - Research
KW  - Methodology
ER  -