TY  - BOOK
AU  - Creswell,John W.
TI  - Research design: qualitative, quantitative, and mixed method approaches 
SN  - 9781452274614 (pbk.)
PY  - 2014///
CY  - Thousand Oaks, CA
PB  - SAGE
KW  - Social sciences
KW  - Research
KW  - Methodology
KW  - Statistical methods
N1  - Includes bibliographical references and index
ER  -