TY  - BOOK
AU  - Creswell,John W.
TI  - Research design: qualitative, quantitative, and mixed methods approaches 
SN  - 9781452274614
AV  - H62 .C6963 2014
U1  - 300.72/1 23
PY  - 2014///
CY  - Thousand Oaks
PB  - SAGE Publications
KW  - Social sciences
KW  - Research
KW  - Methodology
KW  - Statistical methods
N1  - Includes bibliographical references (p. 251-260) and indexes
ER  -