TY  - BOOK
AU  - Creswell,John W.
TI  - Research design: qualitative, quantitative, and mixed methods approaches 
SN  - 141296556X (cloth)
AV  - H62 C923 2009
PY  - 2009///
CY  - Thousand Oaks, Calif.
PB  - Sage Publications
KW  - Social sciences
KW  - Research
KW  - Methodology
KW  - Statistical methods
ER  -