TY  - BOOK
AU  - Creswell,John W.
TI  - Research design: qualitative, quantitative, and mixed methods approaches 
SN  - 9781452226101 (pbk.)
AV  - H62 .C75 2014
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  -