TY  - BOOK
AU  - Creswell,John W.
TI  - Research design: qualitative & quantitative approaches
SN  - 0803952546
PY  - 1994///
CY  - Thousand Oaks
PB  - Sage Publications
KW  - Social sciences
KW  - Research
KW  - Methodology
KW  - Statistical methods
ER  -