TY  - BOOK
AU  - Yin, Robert K
TI  - Case study research: design and methods. (4th ed.)
T2  - Applied social research methods series
SN  - 9781412960991
AV  - H 62 Yin 
PY  - 2009///
CY  - London
PB  - SAGE Publications
KW  - CASE METHOD
KW  - RESEARCH COLLABORATION
KW  - SOCIAL SCIENCES--RESEARCH--METHODOLOGY
ER  -