TY  - BOOK
AU  - CRESWELL John W.
TI  - Research design :  qualitative, quantitative, and mixed methods approaches
SN  - 0761924418
PY  - 2003///
CY  - New Delhi
PB  - Sage 
KW  - Social sciences
KW  - Research
KW  - Methodology
KW  - Statistical methods
N1  - includes:references, index
ER  -